Peter showed how to get the minimums from a list or data frame using

sapply, here is a way to copy your 1440 vectors into a single list

(doing this and keeping your data in a list instead of separate

vectors will make your life easier in general):

my.list <- lapply( 1:1440, function(x) get( sprintf("v%i",x)) )

You can then name the elements of the list, if you want, with something like:

names(my.list) <- sprintf("v%i", 1:1440)

Then if all the vectors are of the same length you can convert this

into a data frame with:

df <- as.data.frame(my.list)

But this is not needed as most of the work can be done with it as a

list (and if they are different lengths then the list is how it should

stay).

Either way you can now use sapply on the list/data frame to get all

the minimums.

To anticipate a possible future question, if you next want the minimum

of each position across vectors then you can use the pmin function:

do.call( pmin, my.list )

On Fri, Apr 6, 2012 at 12:29 AM, peter dalgaard <

[hidden email]> wrote:

>

> On Apr 6, 2012, at 00:25 , ikuzar wrote:

>

>> Hi,

>>

>> I'd like to know how to get a vector of min value from many vectors without

>> making a loop. For example :

>>

>>> v1 = c( 1, 2, 3)

>>> v2 = c( 2, 3, 4)

>>> v3 = c(3, 4, 5)

>>> df = data.frame(v1, v2, v3)

>>> df

>> v1 v2 v3

>> 1 1 2 3

>> 2 2 3 4

>> 3 3 4 5

>>> min_vect = min(df)

>>> min_vect

>> [1] 1

>>

>> I 'd like to get min_vect = (1, 2, 3), where 1 is the min of v1, 2 is the

>> min of v2 and 3 is the min of v3.

>>

>> The example above are very easy but, in real, I have got v1, v2, ... v1440

>

> sapply(df, min)

>

> (possibly sapply(df, min, na.rm=TRUE) )

>

>>

>> Thanks for your help,

>>

>> ikuzar

>>

>> --

>> View this message in context:

http://r.789695.n4.nabble.com/how-to-compute-a-vector-of-min-values-tp4536224p4536224.html>> Sent from the R help mailing list archive at Nabble.com.

>>

>> ______________________________________________

>>

[hidden email] mailing list

>>

https://stat.ethz.ch/mailman/listinfo/r-help>> PLEASE do read the posting guide

http://www.R-project.org/posting-guide.html>> and provide commented, minimal, self-contained, reproducible code.

>

> --

> Peter Dalgaard, Professor,

> Center for Statistics, Copenhagen Business School

> Solbjerg Plads 3, 2000 Frederiksberg, Denmark

> Phone: (+45)38153501

> Email:

[hidden email] Priv:

[hidden email]
>

> ______________________________________________

>

[hidden email] mailing list

>

https://stat.ethz.ch/mailman/listinfo/r-help> PLEASE do read the posting guide

http://www.R-project.org/posting-guide.html> and provide commented, minimal, self-contained, reproducible code.

--

Gregory (Greg) L. Snow Ph.D.

[hidden email]
______________________________________________

[hidden email] mailing list

https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide

http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.