

Hi all,
In a data set I have group(GR) and two variables x and y. I want to
remove a group that have the same record for the x variable in each
row.
DM < read.table( text='GR x y
A 25 125
A 23 135
A 14 145
A 12 230
B 25 321
B 25 512
B 25 123
B 25 451
C 11 521
C 14 235
C 15 258
C 10 654',header = TRUE, stringsAsFactors = FALSE)
In this example the output should contain group A and C as group B
has the same record for the variable x .
The result will be
A 25 125
A 23 135
A 14 145
A 12 230
C 11 521
C 14 235
C 15 258
C 10 654
How do I do it R?
Thank you.
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>
> Hi all,
> In a data set I have group(GR) and two variables x and y. I want to
> remove a group that have the same record for the x variable in each
> row.
>
> DM < read.table( text='GR x y
> A 25 125
> A 23 135
> A 14 145
> A 12 230
> B 25 321
> B 25 512
> B 25 123
> B 25 451
> C 11 521
> C 14 235
> C 15 258
> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>
> In this example the output should contain group A and C as group B
> has the same record for the variable x .
>
> The result will be
> A 25 125
> A 23 135
> A 14 145
> A 12 230
> C 11 521
> C 14 235
> C 15 258
> C 10 654
Try:
DM[ !duplicated(DM$x) , ]
>
> How do I do it R?
> Thank you.
>
> ______________________________________________
> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/rhelp> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html> and provide commented, minimal, selfcontained, reproducible code.
David Winsemius
Alameda, CA, USA
'Any technology distinguishable from magic is insufficiently advanced.' Gehm's Corollary to Clarke's Third Law
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


Thank you David.
This will not work. Tthis removes only duplicate records.
DM[ !duplicated(DM$x) , ]
My goal is to remove the group if all elements of x in that group have
the same value.
On Wed, Dec 6, 2017 at 5:21 PM, David Winsemius < [hidden email]> wrote:
>
>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>
>> Hi all,
>> In a data set I have group(GR) and two variables x and y. I want to
>> remove a group that have the same record for the x variable in each
>> row.
>>
>> DM < read.table( text='GR x y
>> A 25 125
>> A 23 135
>> A 14 145
>> A 12 230
>> B 25 321
>> B 25 512
>> B 25 123
>> B 25 451
>> C 11 521
>> C 14 235
>> C 15 258
>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>
>> In this example the output should contain group A and C as group B
>> has the same record for the variable x .
>>
>> The result will be
>> A 25 125
>> A 23 135
>> A 14 145
>> A 12 230
>> C 11 521
>> C 14 235
>> C 15 258
>> C 10 654
>
> Try:
>
> DM[ !duplicated(DM$x) , ]
>>
>> How do I do it R?
>> Thank you.
>>
>> ______________________________________________
>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/rhelp>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>> and provide commented, minimal, selfcontained, reproducible code.
>
> David Winsemius
> Alameda, CA, USA
>
> 'Any technology distinguishable from magic is insufficiently advanced.' Gehm's Corollary to Clarke's Third Law
>
>
>
>
>
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


subset( DM, "B" != x )
This is covered in the Introduction to R document that comes with R.

Sent from my phone. Please excuse my brevity.
On December 6, 2017 3:21:12 PM PST, David Winsemius < [hidden email]> wrote:
>
>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>
>> Hi all,
>> In a data set I have group(GR) and two variables x and y. I want to
>> remove a group that have the same record for the x variable in each
>> row.
>>
>> DM < read.table( text='GR x y
>> A 25 125
>> A 23 135
>> A 14 145
>> A 12 230
>> B 25 321
>> B 25 512
>> B 25 123
>> B 25 451
>> C 11 521
>> C 14 235
>> C 15 258
>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>
>> In this example the output should contain group A and C as group B
>> has the same record for the variable x .
>>
>> The result will be
>> A 25 125
>> A 23 135
>> A 14 145
>> A 12 230
>> C 11 521
>> C 14 235
>> C 15 258
>> C 10 654
>
>Try:
>
>DM[ !duplicated(DM$x) , ]
>>
>> How do I do it R?
>> Thank you.
>>
>> ______________________________________________
>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/rhelp>> PLEASE do read the posting guide
> http://www.Rproject.org/postingguide.html>> and provide commented, minimal, selfcontained, reproducible code.
>
>David Winsemius
>Alameda, CA, USA
>
>'Any technology distinguishable from magic is insufficiently advanced.'
> Gehm's Corollary to Clarke's Third Law
>
>______________________________________________
> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/rhelp>PLEASE do read the posting guide
> http://www.Rproject.org/postingguide.html>and provide commented, minimal, selfcontained, reproducible code.
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


Thank you Jeff,
subset( DM, "B" != x ), this works if I know the group only.
But if I don't know that group in this case "B", how do I identify
group(s) that all elements of x have the same value?
On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller < [hidden email]> wrote:
> subset( DM, "B" != x )
>
> This is covered in the Introduction to R document that comes with R.
> 
> Sent from my phone. Please excuse my brevity.
>
> On December 6, 2017 3:21:12 PM PST, David Winsemius < [hidden email]> wrote:
>>
>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>>
>>> Hi all,
>>> In a data set I have group(GR) and two variables x and y. I want to
>>> remove a group that have the same record for the x variable in each
>>> row.
>>>
>>> DM < read.table( text='GR x y
>>> A 25 125
>>> A 23 135
>>> A 14 145
>>> A 12 230
>>> B 25 321
>>> B 25 512
>>> B 25 123
>>> B 25 451
>>> C 11 521
>>> C 14 235
>>> C 15 258
>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>>
>>> In this example the output should contain group A and C as group B
>>> has the same record for the variable x .
>>>
>>> The result will be
>>> A 25 125
>>> A 23 135
>>> A 14 145
>>> A 12 230
>>> C 11 521
>>> C 14 235
>>> C 15 258
>>> C 10 654
>>
>>Try:
>>
>>DM[ !duplicated(DM$x) , ]
>>>
>>> How do I do it R?
>>> Thank you.
>>>
>>> ______________________________________________
>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>> PLEASE do read the posting guide
>> http://www.Rproject.org/postingguide.html>>> and provide commented, minimal, selfcontained, reproducible code.
>>
>>David Winsemius
>>Alameda, CA, USA
>>
>>'Any technology distinguishable from magic is insufficiently advanced.'
>> Gehm's Corollary to Clarke's Third Law
>>
>>______________________________________________
>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/rhelp>>PLEASE do read the posting guide
>> http://www.Rproject.org/postingguide.html>>and provide commented, minimal, selfcontained, reproducible code.
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


Hi Ashta,
There are many ways to do it. Here is one:
vars < sapply(split(DM$x, DM$GR), var)
DM[DM$GR %in% names(vars[vars > 0]), ]
Best
Ista
On Wed, Dec 6, 2017 at 6:58 PM, Ashta < [hidden email]> wrote:
> Thank you Jeff,
>
> subset( DM, "B" != x ), this works if I know the group only.
> But if I don't know that group in this case "B", how do I identify
> group(s) that all elements of x have the same value?
>
> On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller < [hidden email]> wrote:
>> subset( DM, "B" != x )
>>
>> This is covered in the Introduction to R document that comes with R.
>> 
>> Sent from my phone. Please excuse my brevity.
>>
>> On December 6, 2017 3:21:12 PM PST, David Winsemius < [hidden email]> wrote:
>>>
>>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>>>
>>>> Hi all,
>>>> In a data set I have group(GR) and two variables x and y. I want to
>>>> remove a group that have the same record for the x variable in each
>>>> row.
>>>>
>>>> DM < read.table( text='GR x y
>>>> A 25 125
>>>> A 23 135
>>>> A 14 145
>>>> A 12 230
>>>> B 25 321
>>>> B 25 512
>>>> B 25 123
>>>> B 25 451
>>>> C 11 521
>>>> C 14 235
>>>> C 15 258
>>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>>>
>>>> In this example the output should contain group A and C as group B
>>>> has the same record for the variable x .
>>>>
>>>> The result will be
>>>> A 25 125
>>>> A 23 135
>>>> A 14 145
>>>> A 12 230
>>>> C 11 521
>>>> C 14 235
>>>> C 15 258
>>>> C 10 654
>>>
>>>Try:
>>>
>>>DM[ !duplicated(DM$x) , ]
>>>>
>>>> How do I do it R?
>>>> Thank you.
>>>>
>>>> ______________________________________________
>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>> PLEASE do read the posting guide
>>> http://www.Rproject.org/postingguide.html>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>
>>>David Winsemius
>>>Alameda, CA, USA
>>>
>>>'Any technology distinguishable from magic is insufficiently advanced.'
>>> Gehm's Corollary to Clarke's Third Law
>>>
>>>______________________________________________
>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>PLEASE do read the posting guide
>>> http://www.Rproject.org/postingguide.html>>>and provide commented, minimal, selfcontained, reproducible code.
>
> ______________________________________________
> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/rhelp> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html> and provide commented, minimal, selfcontained, reproducible code.
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


Thank you Ista! Worked fine.
On Wed, Dec 6, 2017 at 5:59 PM, Ista Zahn < [hidden email]> wrote:
> Hi Ashta,
>
> There are many ways to do it. Here is one:
>
> vars < sapply(split(DM$x, DM$GR), var)
> DM[DM$GR %in% names(vars[vars > 0]), ]
>
> Best
> Ista
>
> On Wed, Dec 6, 2017 at 6:58 PM, Ashta < [hidden email]> wrote:
>> Thank you Jeff,
>>
>> subset( DM, "B" != x ), this works if I know the group only.
>> But if I don't know that group in this case "B", how do I identify
>> group(s) that all elements of x have the same value?
>>
>> On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller < [hidden email]> wrote:
>>> subset( DM, "B" != x )
>>>
>>> This is covered in the Introduction to R document that comes with R.
>>> 
>>> Sent from my phone. Please excuse my brevity.
>>>
>>> On December 6, 2017 3:21:12 PM PST, David Winsemius < [hidden email]> wrote:
>>>>
>>>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>>>>
>>>>> Hi all,
>>>>> In a data set I have group(GR) and two variables x and y. I want to
>>>>> remove a group that have the same record for the x variable in each
>>>>> row.
>>>>>
>>>>> DM < read.table( text='GR x y
>>>>> A 25 125
>>>>> A 23 135
>>>>> A 14 145
>>>>> A 12 230
>>>>> B 25 321
>>>>> B 25 512
>>>>> B 25 123
>>>>> B 25 451
>>>>> C 11 521
>>>>> C 14 235
>>>>> C 15 258
>>>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>>>>
>>>>> In this example the output should contain group A and C as group B
>>>>> has the same record for the variable x .
>>>>>
>>>>> The result will be
>>>>> A 25 125
>>>>> A 23 135
>>>>> A 14 145
>>>>> A 12 230
>>>>> C 11 521
>>>>> C 14 235
>>>>> C 15 258
>>>>> C 10 654
>>>>
>>>>Try:
>>>>
>>>>DM[ !duplicated(DM$x) , ]
>>>>>
>>>>> How do I do it R?
>>>>> Thank you.
>>>>>
>>>>> ______________________________________________
>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>> PLEASE do read the posting guide
>>>> http://www.Rproject.org/postingguide.html>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>
>>>>David Winsemius
>>>>Alameda, CA, USA
>>>>
>>>>'Any technology distinguishable from magic is insufficiently advanced.'
>>>> Gehm's Corollary to Clarke's Third Law
>>>>
>>>>______________________________________________
>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>PLEASE do read the posting guide
>>>> http://www.Rproject.org/postingguide.html>>>>and provide commented, minimal, selfcontained, reproducible code.
>>
>> ______________________________________________
>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/rhelp>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>> and provide commented, minimal, selfcontained, reproducible code.
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


> On Dec 6, 2017, at 4:27 PM, Ashta < [hidden email]> wrote:
>
> Thank you Ista! Worked fine.
Here's another (possibly more direct in its logic?):
DM[ !ave(DM$x, DM$GR, FUN= function(x) {!length(unique(x))==1}), ]
GR x y
5 B 25 321
6 B 25 512
7 B 25 123
8 B 25 451

David
> On Wed, Dec 6, 2017 at 5:59 PM, Ista Zahn < [hidden email]> wrote:
>> Hi Ashta,
>>
>> There are many ways to do it. Here is one:
>>
>> vars < sapply(split(DM$x, DM$GR), var)
>> DM[DM$GR %in% names(vars[vars > 0]), ]
>>
>> Best
>> Ista
>>
>> On Wed, Dec 6, 2017 at 6:58 PM, Ashta < [hidden email]> wrote:
>>> Thank you Jeff,
>>>
>>> subset( DM, "B" != x ), this works if I know the group only.
>>> But if I don't know that group in this case "B", how do I identify
>>> group(s) that all elements of x have the same value?
>>>
>>> On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller < [hidden email]> wrote:
>>>> subset( DM, "B" != x )
>>>>
>>>> This is covered in the Introduction to R document that comes with R.
>>>> 
>>>> Sent from my phone. Please excuse my brevity.
>>>>
>>>> On December 6, 2017 3:21:12 PM PST, David Winsemius < [hidden email]> wrote:
>>>>>
>>>>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>>>>>
>>>>>> Hi all,
>>>>>> In a data set I have group(GR) and two variables x and y. I want to
>>>>>> remove a group that have the same record for the x variable in each
>>>>>> row.
>>>>>>
>>>>>> DM < read.table( text='GR x y
>>>>>> A 25 125
>>>>>> A 23 135
>>>>>> A 14 145
>>>>>> A 12 230
>>>>>> B 25 321
>>>>>> B 25 512
>>>>>> B 25 123
>>>>>> B 25 451
>>>>>> C 11 521
>>>>>> C 14 235
>>>>>> C 15 258
>>>>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>>>>>
>>>>>> In this example the output should contain group A and C as group B
>>>>>> has the same record for the variable x .
>>>>>>
>>>>>> The result will be
>>>>>> A 25 125
>>>>>> A 23 135
>>>>>> A 14 145
>>>>>> A 12 230
>>>>>> C 11 521
>>>>>> C 14 235
>>>>>> C 15 258
>>>>>> C 10 654
>>>>>
>>>>> Try:
>>>>>
>>>>> DM[ !duplicated(DM$x) , ]
>>>>>>
>>>>>> How do I do it R?
>>>>>> Thank you.
>>>>>>
>>>>>> ______________________________________________
>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>> PLEASE do read the posting guide
>>>>> http://www.Rproject.org/postingguide.html>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>
>>>>> David Winsemius
>>>>> Alameda, CA, USA
>>>>>
>>>>> 'Any technology distinguishable from magic is insufficiently advanced.'
>>>>> Gehm's Corollary to Clarke's Third Law
>>>>>
>>>>> ______________________________________________
>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>> PLEASE do read the posting guide
>>>>> http://www.Rproject.org/postingguide.html>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>
>>> ______________________________________________
>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>>> and provide commented, minimal, selfcontained, reproducible code.
>
> ______________________________________________
> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/rhelp> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html> and provide commented, minimal, selfcontained, reproducible code.
David Winsemius
Alameda, CA, USA
'Any technology distinguishable from magic is insufficiently advanced.' Gehm's Corollary to Clarke's Third Law
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


Hi David, Ista and all,
I have one related question Within one group I want to keep records
conditionally.
example within
group A I want keep rows that have " x" values ranged between 15 and 30.
group B I want keep rows that have " x" values ranged between 40 and 50.
group C I want keep rows that have " x" values ranged between 60 and 75.
DM < read.table( text='GR x y
A 25 125
A 23 135
A 14 145
A 35 230
B 45 321
B 47 512
B 53 123
B 55 451
C 61 521
C 68 235
C 85 258
C 80 654',header = TRUE, stringsAsFactors = FALSE)
The end result will be
A 25 125
A 23 135
B 45 321
B 47 512
C 61 521
C 68 235
Thank you
On Wed, Dec 6, 2017 at 10:34 PM, David Winsemius < [hidden email]> wrote:
>
>> On Dec 6, 2017, at 4:27 PM, Ashta < [hidden email]> wrote:
>>
>> Thank you Ista! Worked fine.
>
> Here's another (possibly more direct in its logic?):
>
> DM[ !ave(DM$x, DM$GR, FUN= function(x) {!length(unique(x))==1}), ]
> GR x y
> 5 B 25 321
> 6 B 25 512
> 7 B 25 123
> 8 B 25 451
>
> 
> David
>
>> On Wed, Dec 6, 2017 at 5:59 PM, Ista Zahn < [hidden email]> wrote:
>>> Hi Ashta,
>>>
>>> There are many ways to do it. Here is one:
>>>
>>> vars < sapply(split(DM$x, DM$GR), var)
>>> DM[DM$GR %in% names(vars[vars > 0]), ]
>>>
>>> Best
>>> Ista
>>>
>>> On Wed, Dec 6, 2017 at 6:58 PM, Ashta < [hidden email]> wrote:
>>>> Thank you Jeff,
>>>>
>>>> subset( DM, "B" != x ), this works if I know the group only.
>>>> But if I don't know that group in this case "B", how do I identify
>>>> group(s) that all elements of x have the same value?
>>>>
>>>> On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller < [hidden email]> wrote:
>>>>> subset( DM, "B" != x )
>>>>>
>>>>> This is covered in the Introduction to R document that comes with R.
>>>>> 
>>>>> Sent from my phone. Please excuse my brevity.
>>>>>
>>>>> On December 6, 2017 3:21:12 PM PST, David Winsemius < [hidden email]> wrote:
>>>>>>
>>>>>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>>>>>>
>>>>>>> Hi all,
>>>>>>> In a data set I have group(GR) and two variables x and y. I want to
>>>>>>> remove a group that have the same record for the x variable in each
>>>>>>> row.
>>>>>>>
>>>>>>> DM < read.table( text='GR x y
>>>>>>> A 25 125
>>>>>>> A 23 135
>>>>>>> A 14 145
>>>>>>> A 12 230
>>>>>>> B 25 321
>>>>>>> B 25 512
>>>>>>> B 25 123
>>>>>>> B 25 451
>>>>>>> C 11 521
>>>>>>> C 14 235
>>>>>>> C 15 258
>>>>>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>>>>>>
>>>>>>> In this example the output should contain group A and C as group B
>>>>>>> has the same record for the variable x .
>>>>>>>
>>>>>>> The result will be
>>>>>>> A 25 125
>>>>>>> A 23 135
>>>>>>> A 14 145
>>>>>>> A 12 230
>>>>>>> C 11 521
>>>>>>> C 14 235
>>>>>>> C 15 258
>>>>>>> C 10 654
>>>>>>
>>>>>> Try:
>>>>>>
>>>>>> DM[ !duplicated(DM$x) , ]
>>>>>>>
>>>>>>> How do I do it R?
>>>>>>> Thank you.
>>>>>>>
>>>>>>> ______________________________________________
>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>> PLEASE do read the posting guide
>>>>>> http://www.Rproject.org/postingguide.html>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>>
>>>>>> David Winsemius
>>>>>> Alameda, CA, USA
>>>>>>
>>>>>> 'Any technology distinguishable from magic is insufficiently advanced.'
>>>>>> Gehm's Corollary to Clarke's Third Law
>>>>>>
>>>>>> ______________________________________________
>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>> PLEASE do read the posting guide
>>>>>> http://www.Rproject.org/postingguide.html>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>
>>>> ______________________________________________
>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>>>> and provide commented, minimal, selfcontained, reproducible code.
>>
>> ______________________________________________
>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/rhelp>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>> and provide commented, minimal, selfcontained, reproducible code.
>
> David Winsemius
> Alameda, CA, USA
>
> 'Any technology distinguishable from magic is insufficiently advanced.' Gehm's Corollary to Clarke's Third Law
>
>
>
>
>
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


> On Dec 8, 2017, at 4:48 PM, Ashta < [hidden email]> wrote:
>
> Hi David, Ista and all,
>
> I have one related question Within one group I want to keep records
> conditionally.
> example within
> group A I want keep rows that have " x" values ranged between 15 and 30.
> group B I want keep rows that have " x" values ranged between 40 and 50.
> group C I want keep rows that have " x" values ranged between 60 and 75.
When you have a problem where there are multiple "parallel: parameters, the function to "reach for" is `mapply`.
mapply( your_selection_func, group_vec, min_vec, max_vec)
... and this will probably return the values as a list (of dataframes if you build the function correctly, so you may may need to then do:
do.call(rbind, ...)

David.
>
>
> DM < read.table( text='GR x y
> A 25 125
> A 23 135
> A 14 145
> A 35 230
> B 45 321
> B 47 512
> B 53 123
> B 55 451
> C 61 521
> C 68 235
> C 85 258
> C 80 654',header = TRUE, stringsAsFactors = FALSE)
>
>
> The end result will be
> A 25 125
> A 23 135
> B 45 321
> B 47 512
> C 61 521
> C 68 235
>
> Thank you
>
> On Wed, Dec 6, 2017 at 10:34 PM, David Winsemius < [hidden email]> wrote:
>>
>>> On Dec 6, 2017, at 4:27 PM, Ashta < [hidden email]> wrote:
>>>
>>> Thank you Ista! Worked fine.
>>
>> Here's another (possibly more direct in its logic?):
>>
>> DM[ !ave(DM$x, DM$GR, FUN= function(x) {!length(unique(x))==1}), ]
>> GR x y
>> 5 B 25 321
>> 6 B 25 512
>> 7 B 25 123
>> 8 B 25 451
>>
>> 
>> David
>>
>>> On Wed, Dec 6, 2017 at 5:59 PM, Ista Zahn < [hidden email]> wrote:
>>>> Hi Ashta,
>>>>
>>>> There are many ways to do it. Here is one:
>>>>
>>>> vars < sapply(split(DM$x, DM$GR), var)
>>>> DM[DM$GR %in% names(vars[vars > 0]), ]
>>>>
>>>> Best
>>>> Ista
>>>>
>>>> On Wed, Dec 6, 2017 at 6:58 PM, Ashta < [hidden email]> wrote:
>>>>> Thank you Jeff,
>>>>>
>>>>> subset( DM, "B" != x ), this works if I know the group only.
>>>>> But if I don't know that group in this case "B", how do I identify
>>>>> group(s) that all elements of x have the same value?
>>>>>
>>>>> On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller < [hidden email]> wrote:
>>>>>> subset( DM, "B" != x )
>>>>>>
>>>>>> This is covered in the Introduction to R document that comes with R.
>>>>>> 
>>>>>> Sent from my phone. Please excuse my brevity.
>>>>>>
>>>>>> On December 6, 2017 3:21:12 PM PST, David Winsemius < [hidden email]> wrote:
>>>>>>>
>>>>>>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>>>>>>>
>>>>>>>> Hi all,
>>>>>>>> In a data set I have group(GR) and two variables x and y. I want to
>>>>>>>> remove a group that have the same record for the x variable in each
>>>>>>>> row.
>>>>>>>>
>>>>>>>> DM < read.table( text='GR x y
>>>>>>>> A 25 125
>>>>>>>> A 23 135
>>>>>>>> A 14 145
>>>>>>>> A 12 230
>>>>>>>> B 25 321
>>>>>>>> B 25 512
>>>>>>>> B 25 123
>>>>>>>> B 25 451
>>>>>>>> C 11 521
>>>>>>>> C 14 235
>>>>>>>> C 15 258
>>>>>>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>>>>>>>
>>>>>>>> In this example the output should contain group A and C as group B
>>>>>>>> has the same record for the variable x .
>>>>>>>>
>>>>>>>> The result will be
>>>>>>>> A 25 125
>>>>>>>> A 23 135
>>>>>>>> A 14 145
>>>>>>>> A 12 230
>>>>>>>> C 11 521
>>>>>>>> C 14 235
>>>>>>>> C 15 258
>>>>>>>> C 10 654
>>>>>>>
>>>>>>> Try:
>>>>>>>
>>>>>>> DM[ !duplicated(DM$x) , ]
>>>>>>>>
>>>>>>>> How do I do it R?
>>>>>>>> Thank you.
>>>>>>>>
>>>>>>>> ______________________________________________
>>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>>> PLEASE do read the posting guide
>>>>>>> http://www.Rproject.org/postingguide.html>>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>>>
>>>>>>> David Winsemius
>>>>>>> Alameda, CA, USA
>>>>>>>
>>>>>>> 'Any technology distinguishable from magic is insufficiently advanced.'
>>>>>>> Gehm's Corollary to Clarke's Third Law
>>>>>>>
>>>>>>> ______________________________________________
>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>> PLEASE do read the posting guide
>>>>>>> http://www.Rproject.org/postingguide.html>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>
>>>>> ______________________________________________
>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>
>>> ______________________________________________
>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>>> and provide commented, minimal, selfcontained, reproducible code.
>>
>> David Winsemius
>> Alameda, CA, USA
>>
>> 'Any technology distinguishable from magic is insufficiently advanced.' Gehm's Corollary to Clarke's Third Law
>>
>>
>>
>>
>>
David Winsemius
Alameda, CA, USA
'Any technology distinguishable from magic is insufficiently advanced.' Gehm's Corollary to Clarke's Third Law
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


library(dplyr)
DM < read.table( text='GR x y
A 25 125
A 23 135
.
.
.
)
DM %>% filter((GR == "A" & (x >= 15) & (x <= 30)) 
(GR == "B" & (x >= 40) & (x <= 50)) 
(GR == "C" & (x >= 60) & (x <= 75)))
On Fri, Dec 8, 2017 at 4:48 PM, Ashta < [hidden email]> wrote:
> Hi David, Ista and all,
>
> I have one related question Within one group I want to keep records
> conditionally.
> example within
> group A I want keep rows that have " x" values ranged between 15 and 30.
> group B I want keep rows that have " x" values ranged between 40 and 50.
> group C I want keep rows that have " x" values ranged between 60 and 75.
>
>
> DM < read.table( text='GR x y
> A 25 125
> A 23 135
> A 14 145
> A 35 230
> B 45 321
> B 47 512
> B 53 123
> B 55 451
> C 61 521
> C 68 235
> C 85 258
> C 80 654',header = TRUE, stringsAsFactors = FALSE)
>
>
> The end result will be
> A 25 125
> A 23 135
> B 45 321
> B 47 512
> C 61 521
> C 68 235
>
> Thank you
>
> On Wed, Dec 6, 2017 at 10:34 PM, David Winsemius < [hidden email]> wrote:
>>
>>> On Dec 6, 2017, at 4:27 PM, Ashta < [hidden email]> wrote:
>>>
>>> Thank you Ista! Worked fine.
>>
>> Here's another (possibly more direct in its logic?):
>>
>> DM[ !ave(DM$x, DM$GR, FUN= function(x) {!length(unique(x))==1}), ]
>> GR x y
>> 5 B 25 321
>> 6 B 25 512
>> 7 B 25 123
>> 8 B 25 451
>>
>> 
>> David
>>
>>> On Wed, Dec 6, 2017 at 5:59 PM, Ista Zahn < [hidden email]> wrote:
>>>> Hi Ashta,
>>>>
>>>> There are many ways to do it. Here is one:
>>>>
>>>> vars < sapply(split(DM$x, DM$GR), var)
>>>> DM[DM$GR %in% names(vars[vars > 0]), ]
>>>>
>>>> Best
>>>> Ista
>>>>
>>>> On Wed, Dec 6, 2017 at 6:58 PM, Ashta < [hidden email]> wrote:
>>>>> Thank you Jeff,
>>>>>
>>>>> subset( DM, "B" != x ), this works if I know the group only.
>>>>> But if I don't know that group in this case "B", how do I identify
>>>>> group(s) that all elements of x have the same value?
>>>>>
>>>>> On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller < [hidden email]> wrote:
>>>>>> subset( DM, "B" != x )
>>>>>>
>>>>>> This is covered in the Introduction to R document that comes with R.
>>>>>> 
>>>>>> Sent from my phone. Please excuse my brevity.
>>>>>>
>>>>>> On December 6, 2017 3:21:12 PM PST, David Winsemius < [hidden email]> wrote:
>>>>>>>
>>>>>>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>>>>>>>
>>>>>>>> Hi all,
>>>>>>>> In a data set I have group(GR) and two variables x and y. I want to
>>>>>>>> remove a group that have the same record for the x variable in each
>>>>>>>> row.
>>>>>>>>
>>>>>>>> DM < read.table( text='GR x y
>>>>>>>> A 25 125
>>>>>>>> A 23 135
>>>>>>>> A 14 145
>>>>>>>> A 12 230
>>>>>>>> B 25 321
>>>>>>>> B 25 512
>>>>>>>> B 25 123
>>>>>>>> B 25 451
>>>>>>>> C 11 521
>>>>>>>> C 14 235
>>>>>>>> C 15 258
>>>>>>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>>>>>>>
>>>>>>>> In this example the output should contain group A and C as group B
>>>>>>>> has the same record for the variable x .
>>>>>>>>
>>>>>>>> The result will be
>>>>>>>> A 25 125
>>>>>>>> A 23 135
>>>>>>>> A 14 145
>>>>>>>> A 12 230
>>>>>>>> C 11 521
>>>>>>>> C 14 235
>>>>>>>> C 15 258
>>>>>>>> C 10 654
>>>>>>>
>>>>>>> Try:
>>>>>>>
>>>>>>> DM[ !duplicated(DM$x) , ]
>>>>>>>>
>>>>>>>> How do I do it R?
>>>>>>>> Thank you.
>>>>>>>>
>>>>>>>> ______________________________________________
>>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>>> PLEASE do read the posting guide
>>>>>>> http://www.Rproject.org/postingguide.html>>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>>>
>>>>>>> David Winsemius
>>>>>>> Alameda, CA, USA
>>>>>>>
>>>>>>> 'Any technology distinguishable from magic is insufficiently advanced.'
>>>>>>> Gehm's Corollary to Clarke's Third Law
>>>>>>>
>>>>>>> ______________________________________________
>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>> PLEASE do read the posting guide
>>>>>>> http://www.Rproject.org/postingguide.html>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>
>>>>> ______________________________________________
>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>
>>> ______________________________________________
>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>>> and provide commented, minimal, selfcontained, reproducible code.
>>
>> David Winsemius
>> Alameda, CA, USA
>>
>> 'Any technology distinguishable from magic is insufficiently advanced.' Gehm's Corollary to Clarke's Third Law
>>
>>
>>
>>
>>
>
> ______________________________________________
> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/rhelp> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html> and provide commented, minimal, selfcontained, reproducible code.
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


In this case I cannot see an advantage to using dplyr over subset, other
than if dplyr is your hammer then the problem will look like a nail, or if
this is one step in a larger context where dplyr is more useful.
Nor do I think this is a good use for mapply (or dplyr::group_by) because
the groups are handled differently... better to introduce a datadriven
columnar approach than to have three separate algorithms and bind the data
frames together again.
Here are three ways I came up with. I sometimes use a variation of method
3 when the logical tests are rather more complicated than this and I want
to characterize those tests in the final report.
####### reprex
DM < read.table( text =
"GR x y
A 25 125
A 23 135
A 14 145
A 35 230
B 45 321
B 47 512
B 53 123
B 55 451
C 61 521
C 68 235
C 85 258
C 80 654", header = TRUE, stringsAsFactors = FALSE )
# 1 Hardcoded logic
DM1 < subset( DM
, "A" == GR & 15 <= x & x <= 30
 "B" == GR & 40 <= x & x <= 50
 "C" == GR & 60 <= x & x <= 75
)
DM1
#> GR x y
#> 1 A 25 125
#> 2 A 23 135
#> 5 B 45 321
#> 6 B 47 512
#> 9 C 61 521
#> 10 C 68 235
# 2 relational approach
cond < read.table( text =
"GR minx maxx
A 15 30
B 40 50
C 60 75
", header = TRUE )
DM2 < merge( DM, cond, by = "GR" )
DM2 < subset( DM2, minx <= x & x <= maxx, select = c( minx, maxx ) )
DM2
#> GR x y
#> 1 A 25 125
#> 2 A 23 135
#> 5 B 45 321
#> 6 B 47 512
#> 9 C 61 521
#> 10 C 68 235
# 3 Construct selection vector
sel < rep( FALSE, nrow( DM ) )
for ( i in seq.int( nrow( cond ) ) ) {
sel < sel  ( cond$GR[ i ] == DM$GR
& cond$minx[ i ] <= DM$x
& DM$x <= cond$maxx[ i ]
)
}
DM3 < DM[ sel, ]
DM3
#> GR x y
#> 1 A 25 125
#> 2 A 23 135
#> 5 B 45 321
#> 6 B 47 512
#> 9 C 61 521
#> 10 C 68 235
#######
On Fri, 8 Dec 2017, Michael Hannon wrote:
> library(dplyr)
>
> DM < read.table( text='GR x y
> A 25 125
> A 23 135
> .
> .
> .
> )
>
> DM %>% filter((GR == "A" & (x >= 15) & (x <= 30)) 
> (GR == "B" & (x >= 40) & (x <= 50)) 
> (GR == "C" & (x >= 60) & (x <= 75)))
>
>
> On Fri, Dec 8, 2017 at 4:48 PM, Ashta < [hidden email]> wrote:
>> Hi David, Ista and all,
>>
>> I have one related question Within one group I want to keep records
>> conditionally.
>> example within
>> group A I want keep rows that have " x" values ranged between 15 and 30.
>> group B I want keep rows that have " x" values ranged between 40 and 50.
>> group C I want keep rows that have " x" values ranged between 60 and 75.
>>
>>
>> DM < read.table( text='GR x y
>> A 25 125
>> A 23 135
>> A 14 145
>> A 35 230
>> B 45 321
>> B 47 512
>> B 53 123
>> B 55 451
>> C 61 521
>> C 68 235
>> C 85 258
>> C 80 654',header = TRUE, stringsAsFactors = FALSE)
>>
>>
>> The end result will be
>> A 25 125
>> A 23 135
>> B 45 321
>> B 47 512
>> C 61 521
>> C 68 235
>>
>> Thank you
>>
>> On Wed, Dec 6, 2017 at 10:34 PM, David Winsemius < [hidden email]> wrote:
>>>
>>>> On Dec 6, 2017, at 4:27 PM, Ashta < [hidden email]> wrote:
>>>>
>>>> Thank you Ista! Worked fine.
>>>
>>> Here's another (possibly more direct in its logic?):
>>>
>>> DM[ !ave(DM$x, DM$GR, FUN= function(x) {!length(unique(x))==1}), ]
>>> GR x y
>>> 5 B 25 321
>>> 6 B 25 512
>>> 7 B 25 123
>>> 8 B 25 451
>>>
>>> 
>>> David
>>>
>>>> On Wed, Dec 6, 2017 at 5:59 PM, Ista Zahn < [hidden email]> wrote:
>>>>> Hi Ashta,
>>>>>
>>>>> There are many ways to do it. Here is one:
>>>>>
>>>>> vars < sapply(split(DM$x, DM$GR), var)
>>>>> DM[DM$GR %in% names(vars[vars > 0]), ]
>>>>>
>>>>> Best
>>>>> Ista
>>>>>
>>>>> On Wed, Dec 6, 2017 at 6:58 PM, Ashta < [hidden email]> wrote:
>>>>>> Thank you Jeff,
>>>>>>
>>>>>> subset( DM, "B" != x ), this works if I know the group only.
>>>>>> But if I don't know that group in this case "B", how do I identify
>>>>>> group(s) that all elements of x have the same value?
>>>>>>
>>>>>> On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller < [hidden email]> wrote:
>>>>>>> subset( DM, "B" != x )
>>>>>>>
>>>>>>> This is covered in the Introduction to R document that comes with R.
>>>>>>> 
>>>>>>> Sent from my phone. Please excuse my brevity.
>>>>>>>
>>>>>>> On December 6, 2017 3:21:12 PM PST, David Winsemius < [hidden email]> wrote:
>>>>>>>>
>>>>>>>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>>>>>>>>
>>>>>>>>> Hi all,
>>>>>>>>> In a data set I have group(GR) and two variables x and y. I want to
>>>>>>>>> remove a group that have the same record for the x variable in each
>>>>>>>>> row.
>>>>>>>>>
>>>>>>>>> DM < read.table( text='GR x y
>>>>>>>>> A 25 125
>>>>>>>>> A 23 135
>>>>>>>>> A 14 145
>>>>>>>>> A 12 230
>>>>>>>>> B 25 321
>>>>>>>>> B 25 512
>>>>>>>>> B 25 123
>>>>>>>>> B 25 451
>>>>>>>>> C 11 521
>>>>>>>>> C 14 235
>>>>>>>>> C 15 258
>>>>>>>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>>>>>>>>
>>>>>>>>> In this example the output should contain group A and C as group B
>>>>>>>>> has the same record for the variable x .
>>>>>>>>>
>>>>>>>>> The result will be
>>>>>>>>> A 25 125
>>>>>>>>> A 23 135
>>>>>>>>> A 14 145
>>>>>>>>> A 12 230
>>>>>>>>> C 11 521
>>>>>>>>> C 14 235
>>>>>>>>> C 15 258
>>>>>>>>> C 10 654
>>>>>>>>
>>>>>>>> Try:
>>>>>>>>
>>>>>>>> DM[ !duplicated(DM$x) , ]
>>>>>>>>>
>>>>>>>>> How do I do it R?
>>>>>>>>> Thank you.
>>>>>>>>>
>>>>>>>>> ______________________________________________
>>>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>>>> PLEASE do read the posting guide
>>>>>>>> http://www.Rproject.org/postingguide.html>>>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>>>>
>>>>>>>> David Winsemius
>>>>>>>> Alameda, CA, USA
>>>>>>>>
>>>>>>>> 'Any technology distinguishable from magic is insufficiently advanced.'
>>>>>>>> Gehm's Corollary to Clarke's Third Law
>>>>>>>>
>>>>>>>> ______________________________________________
>>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>>> PLEASE do read the posting guide
>>>>>>>> http://www.Rproject.org/postingguide.html>>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>>
>>>>>> ______________________________________________
>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>
>>>> ______________________________________________
>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>
>>> David Winsemius
>>> Alameda, CA, USA
>>>
>>> 'Any technology distinguishable from magic is insufficiently advanced.' Gehm's Corollary to Clarke's Third Law
>>>
>>>
>>>
>>>
>>>
>>
>> ______________________________________________
>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/rhelp>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>> and provide commented, minimal, selfcontained, reproducible code.
>
> ______________________________________________
> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/rhelp> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html> and provide commented, minimal, selfcontained, reproducible code.
>

Jeff Newmiller The ..... ..... Go Live...
DCN:< [hidden email]> Basics: ##.#. ##.#. Live Go...
Live: OO#.. Dead: OO#.. Playing
Research Engineer (Solar/Batteries O.O#. #.O#. with
/Software/Embedded Controllers) .OO#. .OO#. rocks...1k
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


Hello,
Try the following.
keep < list(A = c(15, 30), B = c(40, 50), C = c(60, 75))
sp < split(DM$x, DM$GR)
inx < unlist(lapply(seq_along(sp), function(i) keep[[i]][1] <= sp[[i]]
& sp[[i]] <= keep[[i]][2]))
DM[inx, ]
# GR x y
#1 A 25 125
#2 A 23 135
#5 B 45 321
#6 B 47 512
#9 C 61 521
#10 C 68 235
Hope this helps,
Rui Barradas
On 12/9/2017 12:48 AM, Ashta wrote:
> Hi David, Ista and all,
>
> I have one related question Within one group I want to keep records
> conditionally.
> example within
> group A I want keep rows that have " x" values ranged between 15 and 30.
> group B I want keep rows that have " x" values ranged between 40 and 50.
> group C I want keep rows that have " x" values ranged between 60 and 75.
>
>
> DM < read.table( text='GR x y
> A 25 125
> A 23 135
> A 14 145
> A 35 230
> B 45 321
> B 47 512
> B 53 123
> B 55 451
> C 61 521
> C 68 235
> C 85 258
> C 80 654',header = TRUE, stringsAsFactors = FALSE)
>
>
> The end result will be
> A 25 125
> A 23 135
> B 45 321
> B 47 512
> C 61 521
> C 68 235
>
> Thank you
>
> On Wed, Dec 6, 2017 at 10:34 PM, David Winsemius < [hidden email]> wrote:
>>
>>> On Dec 6, 2017, at 4:27 PM, Ashta < [hidden email]> wrote:
>>>
>>> Thank you Ista! Worked fine.
>>
>> Here's another (possibly more direct in its logic?):
>>
>> DM[ !ave(DM$x, DM$GR, FUN= function(x) {!length(unique(x))==1}), ]
>> GR x y
>> 5 B 25 321
>> 6 B 25 512
>> 7 B 25 123
>> 8 B 25 451
>>
>> 
>> David
>>
>>> On Wed, Dec 6, 2017 at 5:59 PM, Ista Zahn < [hidden email]> wrote:
>>>> Hi Ashta,
>>>>
>>>> There are many ways to do it. Here is one:
>>>>
>>>> vars < sapply(split(DM$x, DM$GR), var)
>>>> DM[DM$GR %in% names(vars[vars > 0]), ]
>>>>
>>>> Best
>>>> Ista
>>>>
>>>> On Wed, Dec 6, 2017 at 6:58 PM, Ashta < [hidden email]> wrote:
>>>>> Thank you Jeff,
>>>>>
>>>>> subset( DM, "B" != x ), this works if I know the group only.
>>>>> But if I don't know that group in this case "B", how do I identify
>>>>> group(s) that all elements of x have the same value?
>>>>>
>>>>> On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller < [hidden email]> wrote:
>>>>>> subset( DM, "B" != x )
>>>>>>
>>>>>> This is covered in the Introduction to R document that comes with R.
>>>>>> 
>>>>>> Sent from my phone. Please excuse my brevity.
>>>>>>
>>>>>> On December 6, 2017 3:21:12 PM PST, David Winsemius < [hidden email]> wrote:
>>>>>>>
>>>>>>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>>>>>>>
>>>>>>>> Hi all,
>>>>>>>> In a data set I have group(GR) and two variables x and y. I want to
>>>>>>>> remove a group that have the same record for the x variable in each
>>>>>>>> row.
>>>>>>>>
>>>>>>>> DM < read.table( text='GR x y
>>>>>>>> A 25 125
>>>>>>>> A 23 135
>>>>>>>> A 14 145
>>>>>>>> A 12 230
>>>>>>>> B 25 321
>>>>>>>> B 25 512
>>>>>>>> B 25 123
>>>>>>>> B 25 451
>>>>>>>> C 11 521
>>>>>>>> C 14 235
>>>>>>>> C 15 258
>>>>>>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>>>>>>>
>>>>>>>> In this example the output should contain group A and C as group B
>>>>>>>> has the same record for the variable x .
>>>>>>>>
>>>>>>>> The result will be
>>>>>>>> A 25 125
>>>>>>>> A 23 135
>>>>>>>> A 14 145
>>>>>>>> A 12 230
>>>>>>>> C 11 521
>>>>>>>> C 14 235
>>>>>>>> C 15 258
>>>>>>>> C 10 654
>>>>>>>
>>>>>>> Try:
>>>>>>>
>>>>>>> DM[ !duplicated(DM$x) , ]
>>>>>>>>
>>>>>>>> How do I do it R?
>>>>>>>> Thank you.
>>>>>>>>
>>>>>>>> ______________________________________________
>>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>>> PLEASE do read the posting guide
>>>>>>> http://www.Rproject.org/postingguide.html>>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>>>
>>>>>>> David Winsemius
>>>>>>> Alameda, CA, USA
>>>>>>>
>>>>>>> 'Any technology distinguishable from magic is insufficiently advanced.'
>>>>>>> Gehm's Corollary to Clarke's Third Law
>>>>>>>
>>>>>>> ______________________________________________
>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>> PLEASE do read the posting guide
>>>>>>> http://www.Rproject.org/postingguide.html>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>
>>>>> ______________________________________________
>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>
>>> ______________________________________________
>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>>> and provide commented, minimal, selfcontained, reproducible code.
>>
>> David Winsemius
>> Alameda, CA, USA
>>
>> 'Any technology distinguishable from magic is insufficiently advanced.' Gehm's Corollary to Clarke's Third Law
>>
>>
>>
>>
>>
>
> ______________________________________________
> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/rhelp> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html> and provide commented, minimal, selfcontained, reproducible code.
>
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


HI
How about this one. It produces the desired result. If you have more
conditions, you can put them in a matrix/DF form and subset as suggested by
one of the previous suggestion.
DM[(DM$GR=="A"&DM$x>=15&DM$x<=30)(DM$GR=="B"&DM$x>=40&DM$x<=50)(DM
$GR=="C"&DM$x>=60&DM$x<=70),]
EK
On Sat, Dec 9, 2017 at 5:00 AM, Rui Barradas < [hidden email]> wrote:
> Hello,
>
> Try the following.
>
> keep < list(A = c(15, 30), B = c(40, 50), C = c(60, 75))
> sp < split(DM$x, DM$GR)
> inx < unlist(lapply(seq_along(sp), function(i) keep[[i]][1] <= sp[[i]] &
> sp[[i]] <= keep[[i]][2]))
> DM[inx, ]
> # GR x y
> #1 A 25 125
> #2 A 23 135
> #5 B 45 321
> #6 B 47 512
> #9 C 61 521
> #10 C 68 235
>
> Hope this helps,
>
> Rui Barradas
>
>
> On 12/9/2017 12:48 AM, Ashta wrote:
>
>> Hi David, Ista and all,
>>
>> I have one related question Within one group I want to keep records
>> conditionally.
>> example within
>> group A I want keep rows that have " x" values ranged between 15 and
>> 30.
>> group B I want keep rows that have " x" values ranged between 40 and
>> 50.
>> group C I want keep rows that have " x" values ranged between 60 and
>> 75.
>>
>>
>> DM < read.table( text='GR x y
>> A 25 125
>> A 23 135
>> A 14 145
>> A 35 230
>> B 45 321
>> B 47 512
>> B 53 123
>> B 55 451
>> C 61 521
>> C 68 235
>> C 85 258
>> C 80 654',header = TRUE, stringsAsFactors = FALSE)
>>
>>
>> The end result will be
>> A 25 125
>> A 23 135
>> B 45 321
>> B 47 512
>> C 61 521
>> C 68 235
>>
>> Thank you
>>
>> On Wed, Dec 6, 2017 at 10:34 PM, David Winsemius < [hidden email]>
>> wrote:
>>
>>>
>>> On Dec 6, 2017, at 4:27 PM, Ashta < [hidden email]> wrote:
>>>>
>>>> Thank you Ista! Worked fine.
>>>>
>>>
>>> Here's another (possibly more direct in its logic?):
>>>
>>> DM[ !ave(DM$x, DM$GR, FUN= function(x) {!length(unique(x))==1}), ]
>>> GR x y
>>> 5 B 25 321
>>> 6 B 25 512
>>> 7 B 25 123
>>> 8 B 25 451
>>>
>>> 
>>> David
>>>
>>> On Wed, Dec 6, 2017 at 5:59 PM, Ista Zahn < [hidden email]> wrote:
>>>>
>>>>> Hi Ashta,
>>>>>
>>>>> There are many ways to do it. Here is one:
>>>>>
>>>>> vars < sapply(split(DM$x, DM$GR), var)
>>>>> DM[DM$GR %in% names(vars[vars > 0]), ]
>>>>>
>>>>> Best
>>>>> Ista
>>>>>
>>>>> On Wed, Dec 6, 2017 at 6:58 PM, Ashta < [hidden email]> wrote:
>>>>>
>>>>>> Thank you Jeff,
>>>>>>
>>>>>> subset( DM, "B" != x ), this works if I know the group only.
>>>>>> But if I don't know that group in this case "B", how do I identify
>>>>>> group(s) that all elements of x have the same value?
>>>>>>
>>>>>> On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller <
>>>>>> [hidden email]> wrote:
>>>>>>
>>>>>>> subset( DM, "B" != x )
>>>>>>>
>>>>>>> This is covered in the Introduction to R document that comes with R.
>>>>>>> 
>>>>>>> Sent from my phone. Please excuse my brevity.
>>>>>>>
>>>>>>> On December 6, 2017 3:21:12 PM PST, David Winsemius <
>>>>>>> [hidden email]> wrote:
>>>>>>>
>>>>>>>>
>>>>>>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>>>>>>>>
>>>>>>>>> Hi all,
>>>>>>>>> In a data set I have group(GR) and two variables x and y. I want
>>>>>>>>> to
>>>>>>>>> remove a group that have the same record for the x variable in
>>>>>>>>> each
>>>>>>>>> row.
>>>>>>>>>
>>>>>>>>> DM < read.table( text='GR x y
>>>>>>>>> A 25 125
>>>>>>>>> A 23 135
>>>>>>>>> A 14 145
>>>>>>>>> A 12 230
>>>>>>>>> B 25 321
>>>>>>>>> B 25 512
>>>>>>>>> B 25 123
>>>>>>>>> B 25 451
>>>>>>>>> C 11 521
>>>>>>>>> C 14 235
>>>>>>>>> C 15 258
>>>>>>>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>>>>>>>>
>>>>>>>>> In this example the output should contain group A and C as group B
>>>>>>>>> has the same record for the variable x .
>>>>>>>>>
>>>>>>>>> The result will be
>>>>>>>>> A 25 125
>>>>>>>>> A 23 135
>>>>>>>>> A 14 145
>>>>>>>>> A 12 230
>>>>>>>>> C 11 521
>>>>>>>>> C 14 235
>>>>>>>>> C 15 258
>>>>>>>>> C 10 654
>>>>>>>>>
>>>>>>>>
>>>>>>>> Try:
>>>>>>>>
>>>>>>>> DM[ !duplicated(DM$x) , ]
>>>>>>>>
>>>>>>>>>
>>>>>>>>> How do I do it R?
>>>>>>>>> Thank you.
>>>>>>>>>
>>>>>>>>> ______________________________________________
>>>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>>>> PLEASE do read the posting guide
>>>>>>>>>
>>>>>>>> http://www.Rproject.org/postingguide.html>>>>>>>>
>>>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>>>>>
>>>>>>>>
>>>>>>>> David Winsemius
>>>>>>>> Alameda, CA, USA
>>>>>>>>
>>>>>>>> 'Any technology distinguishable from magic is insufficiently
>>>>>>>> advanced.'
>>>>>>>> Gehm's Corollary to Clarke's Third Law
>>>>>>>>
>>>>>>>> ______________________________________________
>>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>>> PLEASE do read the posting guide
>>>>>>>> http://www.Rproject.org/postingguide.html>>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>>>>
>>>>>>>
>>>>>> ______________________________________________
>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>> PLEASE do read the posting guide http://www.Rproject.org/posti>>>>>> ngguide.html
>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>>
>>>>>
>>>> ______________________________________________
>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>> PLEASE do read the posting guide http://www.Rproject.org/posti>>>> ngguide.html
>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>
>>>
>>> David Winsemius
>>> Alameda, CA, USA
>>>
>>> 'Any technology distinguishable from magic is insufficiently advanced.'
>>> Gehm's Corollary to Clarke's Third Law
>>>
>>>
>>>
>>>
>>>
>>>
>> ______________________________________________
>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/rhelp>> PLEASE do read the posting guide http://www.Rproject.org/posti>> ngguide.html
>> and provide commented, minimal, selfcontained, reproducible code.
>>
>>
> ______________________________________________
> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/rhelp> PLEASE do read the posting guide http://www.Rproject.org/posti> ngguide.html
> and provide commented, minimal, selfcontained, reproducible code.
>
[[alternative HTML version deleted]]
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


> On Dec 8, 2017, at 6:16 PM, David Winsemius < [hidden email]> wrote:
>
>
>> On Dec 8, 2017, at 4:48 PM, Ashta < [hidden email]> wrote:
>>
>> Hi David, Ista and all,
>>
>> I have one related question Within one group I want to keep records
>> conditionally.
>> example within
>> group A I want keep rows that have " x" values ranged between 15 and 30.
>> group B I want keep rows that have " x" values ranged between 40 and 50.
>> group C I want keep rows that have " x" values ranged between 60 and 75.
>
> When you have a problem where there are multiple "parallel: parameters, the function to "reach for" is `mapply`.
>
> mapply( your_selection_func, group_vec, min_vec, max_vec)
>
> ... and this will probably return the values as a list (of dataframes if you build the function correctly, so you may may need to then do:
>
> do.call(rbind, ...)
do.call( rbind,
mapply( function(dat, grp, minx, maxx) {dat[ dat$GR==grp & dat$x >= minx & dat$x <= maxx, ]},
grp=LETTERS[1:3], minx=c(15,40,60), maxx=c(30,50,75) ,
MoreArgs=list(dat=DM),
IMPLIFY=FALSE))
GR x y
A.1 A 25 125
A.2 A 23 135
B.5 B 45 321
B.6 B 47 512
C.9 C 61 521
C.10 C 68 235
>
> 
> David.
>>
>>
>> DM < read.table( text='GR x y
>> A 25 125
>> A 23 135
>> A 14 145
>> A 35 230
>> B 45 321
>> B 47 512
>> B 53 123
>> B 55 451
>> C 61 521
>> C 68 235
>> C 85 258
>> C 80 654',header = TRUE, stringsAsFactors = FALSE)
>>
>>
>> The end result will be
>> A 25 125
>> A 23 135
>> B 45 321
>> B 47 512
>> C 61 521
>> C 68 235
>>
>> Thank you
>>
>> On Wed, Dec 6, 2017 at 10:34 PM, David Winsemius < [hidden email]> wrote:
>>>
>>>> On Dec 6, 2017, at 4:27 PM, Ashta < [hidden email]> wrote:
>>>>
>>>> Thank you Ista! Worked fine.
>>>
>>> Here's another (possibly more direct in its logic?):
>>>
>>> DM[ !ave(DM$x, DM$GR, FUN= function(x) {!length(unique(x))==1}), ]
>>> GR x y
>>> 5 B 25 321
>>> 6 B 25 512
>>> 7 B 25 123
>>> 8 B 25 451
>>>
>>> 
>>> David
>>>
>>>> On Wed, Dec 6, 2017 at 5:59 PM, Ista Zahn < [hidden email]> wrote:
>>>>> Hi Ashta,
>>>>>
>>>>> There are many ways to do it. Here is one:
>>>>>
>>>>> vars < sapply(split(DM$x, DM$GR), var)
>>>>> DM[DM$GR %in% names(vars[vars > 0]), ]
>>>>>
>>>>> Best
>>>>> Ista
>>>>>
>>>>> On Wed, Dec 6, 2017 at 6:58 PM, Ashta < [hidden email]> wrote:
>>>>>> Thank you Jeff,
>>>>>>
>>>>>> subset( DM, "B" != x ), this works if I know the group only.
>>>>>> But if I don't know that group in this case "B", how do I identify
>>>>>> group(s) that all elements of x have the same value?
>>>>>>
>>>>>> On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller < [hidden email]> wrote:
>>>>>>> subset( DM, "B" != x )
>>>>>>>
>>>>>>> This is covered in the Introduction to R document that comes with R.
>>>>>>> 
>>>>>>> Sent from my phone. Please excuse my brevity.
>>>>>>>
>>>>>>> On December 6, 2017 3:21:12 PM PST, David Winsemius < [hidden email]> wrote:
>>>>>>>>
>>>>>>>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>>>>>>>>>
>>>>>>>>> Hi all,
>>>>>>>>> In a data set I have group(GR) and two variables x and y. I want to
>>>>>>>>> remove a group that have the same record for the x variable in each
>>>>>>>>> row.
>>>>>>>>>
>>>>>>>>> DM < read.table( text='GR x y
>>>>>>>>> A 25 125
>>>>>>>>> A 23 135
>>>>>>>>> A 14 145
>>>>>>>>> A 12 230
>>>>>>>>> B 25 321
>>>>>>>>> B 25 512
>>>>>>>>> B 25 123
>>>>>>>>> B 25 451
>>>>>>>>> C 11 521
>>>>>>>>> C 14 235
>>>>>>>>> C 15 258
>>>>>>>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>>>>>>>>>
>>>>>>>>> In this example the output should contain group A and C as group B
>>>>>>>>> has the same record for the variable x .
>>>>>>>>>
>>>>>>>>> The result will be
>>>>>>>>> A 25 125
>>>>>>>>> A 23 135
>>>>>>>>> A 14 145
>>>>>>>>> A 12 230
>>>>>>>>> C 11 521
>>>>>>>>> C 14 235
>>>>>>>>> C 15 258
>>>>>>>>> C 10 654
>>>>>>>>
>>>>>>>> Try:
>>>>>>>>
>>>>>>>> DM[ !duplicated(DM$x) , ]
>>>>>>>>>
>>>>>>>>> How do I do it R?
>>>>>>>>> Thank you.
>>>>>>>>>
>>>>>>>>> ______________________________________________
>>>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>>>> PLEASE do read the posting guide
>>>>>>>> http://www.Rproject.org/postingguide.html>>>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>>>>
>>>>>>>> David Winsemius
>>>>>>>> Alameda, CA, USA
>>>>>>>>
>>>>>>>> 'Any technology distinguishable from magic is insufficiently advanced.'
>>>>>>>> Gehm's Corollary to Clarke's Third Law
>>>>>>>>
>>>>>>>> ______________________________________________
>>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>>>> PLEASE do read the posting guide
>>>>>>>> http://www.Rproject.org/postingguide.html>>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>>>
>>>>>> ______________________________________________
>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>>>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>>>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>>
>>>> ______________________________________________
>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>>>> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html>>>> and provide commented, minimal, selfcontained, reproducible code.
>>>
>>> David Winsemius
>>> Alameda, CA, USA
>>>
>>> 'Any technology distinguishable from magic is insufficiently advanced.' Gehm's Corollary to Clarke's Third Law
>>>
>>>
>>>
>>>
>>>
>
> David Winsemius
> Alameda, CA, USA
>
> 'Any technology distinguishable from magic is insufficiently advanced.' Gehm's Corollary to Clarke's Third Law
>
> ______________________________________________
> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/rhelp> PLEASE do read the posting guide http://www.Rproject.org/postingguide.html> and provide commented, minimal, selfcontained, reproducible code.
David Winsemius
Alameda, CA, USA
'Any technology distinguishable from magic is insufficiently advanced.' Gehm's Corollary to Clarke's Third Law
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


You could make numeric vectors, named by the group identifier, of the
contraints
and subscript it by group name:
> DM < read.table( text='GR x y
+ A 25 125
+ A 23 135
+ A 14 145
+ A 35 230
+ B 45 321
+ B 47 512
+ B 53 123
+ B 55 451
+ C 61 521
+ C 68 235
+ C 85 258
+ C 80 654',header = TRUE, stringsAsFactors = FALSE)
>
> GRmin < c(A=15, B=40, C=60)
> GRmax < c(A=30, B=50, C=75)
> subset(DM, x>=GRmin[GR] & x <=GRmax[GR])
GR x y
1 A 25 125
2 A 23 135
5 B 45 321
6 B 47 512
9 C 61 521
10 C 68 235
Or, if you want to completely avoid nonstandard evaluation:
> DM[ DM$x >= GRmin[DM$GR] & DM$x <= GRmax[DM$GR], ]
GR x y
1 A 25 125
2 A 23 135
5 B 45 321
6 B 47 512
9 C 61 521
10 C 68 235
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Sat, Dec 9, 2017 at 9:38 AM, David Winsemius < [hidden email]>
wrote:
>
> > On Dec 8, 2017, at 6:16 PM, David Winsemius < [hidden email]>
> wrote:
> >
> >
> >> On Dec 8, 2017, at 4:48 PM, Ashta < [hidden email]> wrote:
> >>
> >> Hi David, Ista and all,
> >>
> >> I have one related question Within one group I want to keep records
> >> conditionally.
> >> example within
> >> group A I want keep rows that have " x" values ranged between 15 and
> 30.
> >> group B I want keep rows that have " x" values ranged between 40
> and 50.
> >> group C I want keep rows that have " x" values ranged between 60
> and 75.
> >
> > When you have a problem where there are multiple "parallel: parameters,
> the function to "reach for" is `mapply`.
> >
> > mapply( your_selection_func, group_vec, min_vec, max_vec)
> >
> > ... and this will probably return the values as a list (of dataframes if
> you build the function correctly, so you may may need to then do:
> >
> > do.call(rbind, ...)
>
> do.call( rbind,
> mapply( function(dat, grp, minx, maxx) {dat[ dat$GR==grp & dat$x >=
> minx & dat$x <= maxx, ]},
> grp=LETTERS[1:3], minx=c(15,40,60), maxx=c(30,50,75) ,
> MoreArgs=list(dat=DM),
> IMPLIFY=FALSE))
> GR x y
> A.1 A 25 125
> A.2 A 23 135
> B.5 B 45 321
> B.6 B 47 512
> C.9 C 61 521
> C.10 C 68 235
>
> >
> > 
> > David.
> >>
> >>
> >> DM < read.table( text='GR x y
> >> A 25 125
> >> A 23 135
> >> A 14 145
> >> A 35 230
> >> B 45 321
> >> B 47 512
> >> B 53 123
> >> B 55 451
> >> C 61 521
> >> C 68 235
> >> C 85 258
> >> C 80 654',header = TRUE, stringsAsFactors = FALSE)
> >>
> >>
> >> The end result will be
> >> A 25 125
> >> A 23 135
> >> B 45 321
> >> B 47 512
> >> C 61 521
> >> C 68 235
> >>
> >> Thank you
> >>
> >> On Wed, Dec 6, 2017 at 10:34 PM, David Winsemius <
> [hidden email]> wrote:
> >>>
> >>>> On Dec 6, 2017, at 4:27 PM, Ashta < [hidden email]> wrote:
> >>>>
> >>>> Thank you Ista! Worked fine.
> >>>
> >>> Here's another (possibly more direct in its logic?):
> >>>
> >>> DM[ !ave(DM$x, DM$GR, FUN= function(x) {!length(unique(x))==1}), ]
> >>> GR x y
> >>> 5 B 25 321
> >>> 6 B 25 512
> >>> 7 B 25 123
> >>> 8 B 25 451
> >>>
> >>> 
> >>> David
> >>>
> >>>> On Wed, Dec 6, 2017 at 5:59 PM, Ista Zahn < [hidden email]> wrote:
> >>>>> Hi Ashta,
> >>>>>
> >>>>> There are many ways to do it. Here is one:
> >>>>>
> >>>>> vars < sapply(split(DM$x, DM$GR), var)
> >>>>> DM[DM$GR %in% names(vars[vars > 0]), ]
> >>>>>
> >>>>> Best
> >>>>> Ista
> >>>>>
> >>>>> On Wed, Dec 6, 2017 at 6:58 PM, Ashta < [hidden email]> wrote:
> >>>>>> Thank you Jeff,
> >>>>>>
> >>>>>> subset( DM, "B" != x ), this works if I know the group only.
> >>>>>> But if I don't know that group in this case "B", how do I identify
> >>>>>> group(s) that all elements of x have the same value?
> >>>>>>
> >>>>>> On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller <
> [hidden email]> wrote:
> >>>>>>> subset( DM, "B" != x )
> >>>>>>>
> >>>>>>> This is covered in the Introduction to R document that comes with
> R.
> >>>>>>> 
> >>>>>>> Sent from my phone. Please excuse my brevity.
> >>>>>>>
> >>>>>>> On December 6, 2017 3:21:12 PM PST, David Winsemius <
> [hidden email]> wrote:
> >>>>>>>>
> >>>>>>>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
> >>>>>>>>>
> >>>>>>>>> Hi all,
> >>>>>>>>> In a data set I have group(GR) and two variables x and y. I
> want to
> >>>>>>>>> remove a group that have the same record for the x variable in
> each
> >>>>>>>>> row.
> >>>>>>>>>
> >>>>>>>>> DM < read.table( text='GR x y
> >>>>>>>>> A 25 125
> >>>>>>>>> A 23 135
> >>>>>>>>> A 14 145
> >>>>>>>>> A 12 230
> >>>>>>>>> B 25 321
> >>>>>>>>> B 25 512
> >>>>>>>>> B 25 123
> >>>>>>>>> B 25 451
> >>>>>>>>> C 11 521
> >>>>>>>>> C 14 235
> >>>>>>>>> C 15 258
> >>>>>>>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
> >>>>>>>>>
> >>>>>>>>> In this example the output should contain group A and C as
> group B
> >>>>>>>>> has the same record for the variable x .
> >>>>>>>>>
> >>>>>>>>> The result will be
> >>>>>>>>> A 25 125
> >>>>>>>>> A 23 135
> >>>>>>>>> A 14 145
> >>>>>>>>> A 12 230
> >>>>>>>>> C 11 521
> >>>>>>>>> C 14 235
> >>>>>>>>> C 15 258
> >>>>>>>>> C 10 654
> >>>>>>>>
> >>>>>>>> Try:
> >>>>>>>>
> >>>>>>>> DM[ !duplicated(DM$x) , ]
> >>>>>>>>>
> >>>>>>>>> How do I do it R?
> >>>>>>>>> Thank you.
> >>>>>>>>>
> >>>>>>>>> ______________________________________________
> >>>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more,
> see
> >>>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp> >>>>>>>>> PLEASE do read the posting guide
> >>>>>>>> http://www.Rproject.org/postingguide.html> >>>>>>>>> and provide commented, minimal, selfcontained, reproducible
> code.
> >>>>>>>>
> >>>>>>>> David Winsemius
> >>>>>>>> Alameda, CA, USA
> >>>>>>>>
> >>>>>>>> 'Any technology distinguishable from magic is insufficiently
> advanced.'
> >>>>>>>> Gehm's Corollary to Clarke's Third Law
> >>>>>>>>
> >>>>>>>> ______________________________________________
> >>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> >>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp> >>>>>>>> PLEASE do read the posting guide
> >>>>>>>> http://www.Rproject.org/postingguide.html> >>>>>>>> and provide commented, minimal, selfcontained, reproducible code.
> >>>>>>
> >>>>>> ______________________________________________
> >>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> >>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp> >>>>>> PLEASE do read the posting guide http://www.Rproject.org/> postingguide.html
> >>>>>> and provide commented, minimal, selfcontained, reproducible code.
> >>>>
> >>>> ______________________________________________
> >>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> >>>> https://stat.ethz.ch/mailman/listinfo/rhelp> >>>> PLEASE do read the posting guide http://www.Rproject.org/> postingguide.html
> >>>> and provide commented, minimal, selfcontained, reproducible code.
> >>>
> >>> David Winsemius
> >>> Alameda, CA, USA
> >>>
> >>> 'Any technology distinguishable from magic is insufficiently
> advanced.' Gehm's Corollary to Clarke's Third Law
> >>>
> >>>
> >>>
> >>>
> >>>
> >
> > David Winsemius
> > Alameda, CA, USA
> >
> > 'Any technology distinguishable from magic is insufficiently advanced.'
> Gehm's Corollary to Clarke's Third Law
> >
> > ______________________________________________
> > [hidden email] mailing list  To UNSUBSCRIBE and more, see
> > https://stat.ethz.ch/mailman/listinfo/rhelp> > PLEASE do read the posting guide http://www.Rproject.org/> postingguide.html
> > and provide commented, minimal, selfcontained, reproducible code.
>
> David Winsemius
> Alameda, CA, USA
>
> 'Any technology distinguishable from magic is insufficiently advanced.'
> Gehm's Corollary to Clarke's Third Law
>
> ______________________________________________
> [hidden email] mailing list  To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/rhelp> PLEASE do read the posting guide http://www.Rproject.org/> postingguide.html
> and provide commented, minimal, selfcontained, reproducible code.
>
[[alternative HTML version deleted]]
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.


Thank you All !!
Now, I have plenty of options to chose.
On Sat, Dec 9, 2017 at 1:21 PM, William Dunlap < [hidden email]> wrote:
> You could make numeric vectors, named by the group identifier, of the
> contraints
> and subscript it by group name:
>
>> DM < read.table( text='GR x y
> + A 25 125
> + A 23 135
> + A 14 145
> + A 35 230
> + B 45 321
> + B 47 512
> + B 53 123
> + B 55 451
> + C 61 521
> + C 68 235
> + C 85 258
> + C 80 654',header = TRUE, stringsAsFactors = FALSE)
>>
>> GRmin < c(A=15, B=40, C=60)
>> GRmax < c(A=30, B=50, C=75)
>> subset(DM, x>=GRmin[GR] & x <=GRmax[GR])
> GR x y
> 1 A 25 125
> 2 A 23 135
> 5 B 45 321
> 6 B 47 512
> 9 C 61 521
> 10 C 68 235
>
> Or, if you want to completely avoid nonstandard evaluation:
>> DM[ DM$x >= GRmin[DM$GR] & DM$x <= GRmax[DM$GR], ]
> GR x y
> 1 A 25 125
> 2 A 23 135
> 5 B 45 321
> 6 B 47 512
> 9 C 61 521
> 10 C 68 235
>
>
>
>
> Bill Dunlap
> TIBCO Software
> wdunlap tibco.com
>
> On Sat, Dec 9, 2017 at 9:38 AM, David Winsemius < [hidden email]>
> wrote:
>>
>>
>> > On Dec 8, 2017, at 6:16 PM, David Winsemius < [hidden email]>
>> > wrote:
>> >
>> >
>> >> On Dec 8, 2017, at 4:48 PM, Ashta < [hidden email]> wrote:
>> >>
>> >> Hi David, Ista and all,
>> >>
>> >> I have one related question Within one group I want to keep records
>> >> conditionally.
>> >> example within
>> >> group A I want keep rows that have " x" values ranged between 15 and
>> >> 30.
>> >> group B I want keep rows that have " x" values ranged between 40
>> >> and 50.
>> >> group C I want keep rows that have " x" values ranged between 60
>> >> and 75.
>> >
>> > When you have a problem where there are multiple "parallel: parameters,
>> > the function to "reach for" is `mapply`.
>> >
>> > mapply( your_selection_func, group_vec, min_vec, max_vec)
>> >
>> > ... and this will probably return the values as a list (of dataframes if
>> > you build the function correctly, so you may may need to then do:
>> >
>> > do.call(rbind, ...)
>>
>> do.call( rbind,
>> mapply( function(dat, grp, minx, maxx) {dat[ dat$GR==grp & dat$x >=
>> minx & dat$x <= maxx, ]},
>> grp=LETTERS[1:3], minx=c(15,40,60), maxx=c(30,50,75) ,
>> MoreArgs=list(dat=DM),
>> IMPLIFY=FALSE))
>> GR x y
>> A.1 A 25 125
>> A.2 A 23 135
>> B.5 B 45 321
>> B.6 B 47 512
>> C.9 C 61 521
>> C.10 C 68 235
>>
>> >
>> > 
>> > David.
>> >>
>> >>
>> >> DM < read.table( text='GR x y
>> >> A 25 125
>> >> A 23 135
>> >> A 14 145
>> >> A 35 230
>> >> B 45 321
>> >> B 47 512
>> >> B 53 123
>> >> B 55 451
>> >> C 61 521
>> >> C 68 235
>> >> C 85 258
>> >> C 80 654',header = TRUE, stringsAsFactors = FALSE)
>> >>
>> >>
>> >> The end result will be
>> >> A 25 125
>> >> A 23 135
>> >> B 45 321
>> >> B 47 512
>> >> C 61 521
>> >> C 68 235
>> >>
>> >> Thank you
>> >>
>> >> On Wed, Dec 6, 2017 at 10:34 PM, David Winsemius
>> >> < [hidden email]> wrote:
>> >>>
>> >>>> On Dec 6, 2017, at 4:27 PM, Ashta < [hidden email]> wrote:
>> >>>>
>> >>>> Thank you Ista! Worked fine.
>> >>>
>> >>> Here's another (possibly more direct in its logic?):
>> >>>
>> >>> DM[ !ave(DM$x, DM$GR, FUN= function(x) {!length(unique(x))==1}), ]
>> >>> GR x y
>> >>> 5 B 25 321
>> >>> 6 B 25 512
>> >>> 7 B 25 123
>> >>> 8 B 25 451
>> >>>
>> >>> 
>> >>> David
>> >>>
>> >>>> On Wed, Dec 6, 2017 at 5:59 PM, Ista Zahn < [hidden email]> wrote:
>> >>>>> Hi Ashta,
>> >>>>>
>> >>>>> There are many ways to do it. Here is one:
>> >>>>>
>> >>>>> vars < sapply(split(DM$x, DM$GR), var)
>> >>>>> DM[DM$GR %in% names(vars[vars > 0]), ]
>> >>>>>
>> >>>>> Best
>> >>>>> Ista
>> >>>>>
>> >>>>> On Wed, Dec 6, 2017 at 6:58 PM, Ashta < [hidden email]> wrote:
>> >>>>>> Thank you Jeff,
>> >>>>>>
>> >>>>>> subset( DM, "B" != x ), this works if I know the group only.
>> >>>>>> But if I don't know that group in this case "B", how do I identify
>> >>>>>> group(s) that all elements of x have the same value?
>> >>>>>>
>> >>>>>> On Wed, Dec 6, 2017 at 5:48 PM, Jeff Newmiller
>> >>>>>> < [hidden email]> wrote:
>> >>>>>>> subset( DM, "B" != x )
>> >>>>>>>
>> >>>>>>> This is covered in the Introduction to R document that comes with
>> >>>>>>> R.
>> >>>>>>> 
>> >>>>>>> Sent from my phone. Please excuse my brevity.
>> >>>>>>>
>> >>>>>>> On December 6, 2017 3:21:12 PM PST, David Winsemius
>> >>>>>>> < [hidden email]> wrote:
>> >>>>>>>>
>> >>>>>>>>> On Dec 6, 2017, at 3:15 PM, Ashta < [hidden email]> wrote:
>> >>>>>>>>>
>> >>>>>>>>> Hi all,
>> >>>>>>>>> In a data set I have group(GR) and two variables x and y. I
>> >>>>>>>>> want to
>> >>>>>>>>> remove a group that have the same record for the x variable in
>> >>>>>>>>> each
>> >>>>>>>>> row.
>> >>>>>>>>>
>> >>>>>>>>> DM < read.table( text='GR x y
>> >>>>>>>>> A 25 125
>> >>>>>>>>> A 23 135
>> >>>>>>>>> A 14 145
>> >>>>>>>>> A 12 230
>> >>>>>>>>> B 25 321
>> >>>>>>>>> B 25 512
>> >>>>>>>>> B 25 123
>> >>>>>>>>> B 25 451
>> >>>>>>>>> C 11 521
>> >>>>>>>>> C 14 235
>> >>>>>>>>> C 15 258
>> >>>>>>>>> C 10 654',header = TRUE, stringsAsFactors = FALSE)
>> >>>>>>>>>
>> >>>>>>>>> In this example the output should contain group A and C as
>> >>>>>>>>> group B
>> >>>>>>>>> has the same record for the variable x .
>> >>>>>>>>>
>> >>>>>>>>> The result will be
>> >>>>>>>>> A 25 125
>> >>>>>>>>> A 23 135
>> >>>>>>>>> A 14 145
>> >>>>>>>>> A 12 230
>> >>>>>>>>> C 11 521
>> >>>>>>>>> C 14 235
>> >>>>>>>>> C 15 258
>> >>>>>>>>> C 10 654
>> >>>>>>>>
>> >>>>>>>> Try:
>> >>>>>>>>
>> >>>>>>>> DM[ !duplicated(DM$x) , ]
>> >>>>>>>>>
>> >>>>>>>>> How do I do it R?
>> >>>>>>>>> Thank you.
>> >>>>>>>>>
>> >>>>>>>>> ______________________________________________
>> >>>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more,
>> >>>>>>>>> see
>> >>>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>> >>>>>>>>> PLEASE do read the posting guide
>> >>>>>>>> http://www.Rproject.org/postingguide.html>> >>>>>>>>> and provide commented, minimal, selfcontained, reproducible
>> >>>>>>>>> code.
>> >>>>>>>>
>> >>>>>>>> David Winsemius
>> >>>>>>>> Alameda, CA, USA
>> >>>>>>>>
>> >>>>>>>> 'Any technology distinguishable from magic is insufficiently
>> >>>>>>>> advanced.'
>> >>>>>>>> Gehm's Corollary to Clarke's Third Law
>> >>>>>>>>
>> >>>>>>>> ______________________________________________
>> >>>>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>> >>>>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>> >>>>>>>> PLEASE do read the posting guide
>> >>>>>>>> http://www.Rproject.org/postingguide.html>> >>>>>>>> and provide commented, minimal, selfcontained, reproducible
>> >>>>>>>> code.
>> >>>>>>
>> >>>>>> ______________________________________________
>> >>>>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>> >>>>>> https://stat.ethz.ch/mailman/listinfo/rhelp>> >>>>>> PLEASE do read the posting guide
>> >>>>>> http://www.Rproject.org/postingguide.html>> >>>>>> and provide commented, minimal, selfcontained, reproducible code.
>> >>>>
>> >>>> ______________________________________________
>> >>>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>> >>>> https://stat.ethz.ch/mailman/listinfo/rhelp>> >>>> PLEASE do read the posting guide
>> >>>> http://www.Rproject.org/postingguide.html>> >>>> and provide commented, minimal, selfcontained, reproducible code.
>> >>>
>> >>> David Winsemius
>> >>> Alameda, CA, USA
>> >>>
>> >>> 'Any technology distinguishable from magic is insufficiently
>> >>> advanced.' Gehm's Corollary to Clarke's Third Law
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >
>> > David Winsemius
>> > Alameda, CA, USA
>> >
>> > 'Any technology distinguishable from magic is insufficiently advanced.'
>> > Gehm's Corollary to Clarke's Third Law
>> >
>> > ______________________________________________
>> > [hidden email] mailing list  To UNSUBSCRIBE and more, see
>> > https://stat.ethz.ch/mailman/listinfo/rhelp>> > PLEASE do read the posting guide
>> > http://www.Rproject.org/postingguide.html>> > and provide commented, minimal, selfcontained, reproducible code.
>>
>> David Winsemius
>> Alameda, CA, USA
>>
>> 'Any technology distinguishable from magic is insufficiently advanced.'
>> Gehm's Corollary to Clarke's Third Law
>>
>> ______________________________________________
>> [hidden email] mailing list  To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/rhelp>> PLEASE do read the posting guide
>> http://www.Rproject.org/postingguide.html>> and provide commented, minimal, selfcontained, reproducible code.
>
>
______________________________________________
[hidden email] mailing list  To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/rhelpPLEASE do read the posting guide http://www.Rproject.org/postingguide.htmland provide commented, minimal, selfcontained, reproducible code.

