Simple problem but I don't see the answer. I'm trying
to clean up some data I have 120 columns in a data.frame. I have one value in a column named "blaw" that I want to change. How do I find the coordinates. I can find the row by doing a subset on the data.frame but how do I find out here "blaw " is in columns without manually counting them or converting names(Df) to a list and reading down the list. Simple example cat <- c( 3,5,6,8,0) dog <- c(3,5,3,6, 0) rat <- c (5, 5, 4, 9, 0) bat <- c( 12, 42, 45, 32, 54) Df <- data.frame(cbind(cat, dog, rat, bat)) Df subset(Df, bat >= 50) ----results cat dog rat bat 5 0 0 0 54 Thus I know that my target is in row 5 but how do I figure out where 'bat' is? All I want to do is be able to say Df[5,4] <- 100 Is there some way to have function(bat) return the column number: some kind of a colnum() function? I had thought that I had found somthing in library(gdata) matchcols but no luck. ______________________________________________ [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. |
?which
> which(Df >= 50, arr.ind=T) row col 5 5 4 On 8/2/06, John Kane <[hidden email]> wrote: > > Simple problem but I don't see the answer. I'm trying > to clean up some data > I have 120 columns in a data.frame. I have one value > in a column named "blaw" that I want to change. How do > I find the coordinates. I can find the row by doing a > subset on the data.frame but how do I find out here > "blaw " is in columns without manually counting them > or converting names(Df) to a list and reading down the > list. > > Simple example > > cat <- c( 3,5,6,8,0) > dog <- c(3,5,3,6, 0) > rat <- c (5, 5, 4, 9, 0) > bat <- c( 12, 42, 45, 32, 54) > > Df <- data.frame(cbind(cat, dog, rat, bat)) > Df > subset(Df, bat >= 50) > > ----results > cat dog rat bat > 5 0 0 0 54 > > > Thus I know that my target is in row 5 but how do I > figure out where 'bat' is? > > All I want to do is be able to say > Df[5,4] <- 100 > > Is there some way to have function(bat) return the > column number: some kind of a colnum() function? I > had thought that I had found somthing in > library(gdata) matchcols but no luck. > > ______________________________________________ > [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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? [[alternative HTML version deleted]] ______________________________________________ [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. |
In reply to this post by John Kane-2
John Kane wrote:
> Simple problem but I don't see the answer. I'm trying > to clean up some data > I have 120 columns in a data.frame. I have one value > in a column named "blaw" that I want to change. How do > I find the coordinates. I can find the row by doing a > subset on the data.frame but how do I find out here > "blaw " is in columns without manually counting them > or converting names(Df) to a list and reading down the > list. > > Simple example > > cat <- c( 3,5,6,8,0) > dog <- c(3,5,3,6, 0) > rat <- c (5, 5, 4, 9, 0) > bat <- c( 12, 42, 45, 32, 54) > > Df <- data.frame(cbind(cat, dog, rat, bat)) > Df > subset(Df, bat >= 50) > > ----results > cat dog rat bat > 5 0 0 0 54 > > > Thus I know that my target is in row 5 but how do I > figure out where 'bat' is? grep("bat", names(Df)) > All I want to do is be able to say > Df[5,4] <- 100 Why not do it this way? Df$bat <- replace(Df$bat, Df$bat >=50, 100) > Is there some way to have function(bat) return the > column number: some kind of a colnum() function? I > had thought that I had found somthing in > library(gdata) matchcols but no luck. > > ______________________________________________ > [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. -- Chuck Cleland, Ph.D. NDRI, Inc. 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 512-0171 (M, W, F) fax: (917) 438-0894 ______________________________________________ [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. |
In reply to this post by John Kane-2
it is the well-known wicked which problem: if you had (grammatically
incorrectly) thought "... which I want to change" then you might have been led to type (in another window): ?which and you would have seen the light. Maybe that() should be an alias for which()? url: www.econ.uiuc.edu/~roger Roger Koenker email [hidden email] Department of Economics vox: 217-333-4558 University of Illinois fax: 217-244-6678 Champaign, IL 61820 On Aug 2, 2006, at 4:01 PM, John Kane wrote: > Simple problem but I don't see the answer. I'm trying > to clean up some data > I have 120 columns in a data.frame. I have one value > in a column named "blaw" that I want to change. How do > I find the coordinates. I can find the row by doing a > subset on the data.frame but how do I find out here > "blaw " is in columns without manually counting them > or converting names(Df) to a list and reading down the > list. > > Simple example > > cat <- c( 3,5,6,8,0) > dog <- c(3,5,3,6, 0) > rat <- c (5, 5, 4, 9, 0) > bat <- c( 12, 42, 45, 32, 54) > > Df <- data.frame(cbind(cat, dog, rat, bat)) > Df > subset(Df, bat >= 50) > > ----results > cat dog rat bat > 5 0 0 0 54 > > > Thus I know that my target is in row 5 but how do I > figure out where 'bat' is? > > All I want to do is be able to say > Df[5,4] <- 100 > > Is there some way to have function(bat) return the > column number: some kind of a colnum() function? I > had thought that I had found somthing in > library(gdata) matchcols but no luck. > > ______________________________________________ > [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. ______________________________________________ [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. |
In reply to this post by jholtman
--- jim holtman <[hidden email]> wrote: > ?which > > > which(Df >= 50, arr.ind=T) > row col > 5 5 4 I knew it was going to be blinding obvious! I even read ?which somehow misunderstood arr.ind. Thanks again. > > On 8/2/06, John Kane <[hidden email]> wrote: > > > > Simple problem but I don't see the answer. I'm > trying > > to clean up some data > > I have 120 columns in a data.frame. I have one > value > > in a column named "blaw" that I want to change. > How do > > I find the coordinates. I can find the row by > doing a > > subset on the data.frame but how do I find out > here > > "blaw " is in columns without manually counting > them > > or converting names(Df) to a list and reading down > the > > list. > > > > Simple example > > > > cat <- c( 3,5,6,8,0) > > dog <- c(3,5,3,6, 0) > > rat <- c (5, 5, 4, 9, 0) > > bat <- c( 12, 42, 45, 32, 54) > > > > Df <- data.frame(cbind(cat, dog, rat, bat)) > > Df > > subset(Df, bat >= 50) > > > > ----results > > cat dog rat bat > > 5 0 0 0 54 > > > > > > Thus I know that my target is in row 5 but how do > I > > figure out where 'bat' is? > > > > All I want to do is be able to say > > Df[5,4] <- 100 > > > > Is there some way to have function(bat) return the > > column number: some kind of a colnum() function? > I > > had thought that I had found somthing in > > library(gdata) matchcols but no luck. > > > > ______________________________________________ > > [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. > > > > > > -- > Jim Holtman > Cincinnati, OH > +1 513 646 9390 > > What is the problem you are trying to solve? > ______________________________________________ [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. |
In reply to this post by Chuck Cleland
--- Chuck Cleland <[hidden email]> wrote: > John Kane wrote: > > Simple problem but I don't see the answer. I'm > trying > > to clean up some data > > I have 120 columns in a data.frame. I have one > value > > in a column named "blaw" that I want to change. > How do > > I find the coordinates. I can find the row by > doing a > > subset on the data.frame but how do I find out > here > > "blaw " is in columns without manually counting > them > > or converting names(Df) to a list and reading down > the > > list. > > > > Simple example > > > > cat <- c( 3,5,6,8,0) > > dog <- c(3,5,3,6, 0) > > rat <- c (5, 5, 4, 9, 0) > > bat <- c( 12, 42, 45, 32, 54) > > > > Df <- data.frame(cbind(cat, dog, rat, bat)) > > Df > > subset(Df, bat >= 50) > > > > ----results > > cat dog rat bat > > 5 0 0 0 54 > > > > > > Thus I know that my target is in row 5 but how do > I > > figure out where 'bat' is? > > grep("bat", names(Df)) Thank you, I have never used grep. More reading :( > > > All I want to do is be able to say > > Df[5,4] <- 100 > > Why not do it this way? > > Df$bat <- replace(Df$bat, Df$bat >=50, 100) Maybe because it is too blinding simple? I'm still thinking in SAS or Systat. A great solution thanks very much > > > Is there some way to have function(bat) return the > > column number: some kind of a colnum() function? > I > > had thought that I had found somthing in > > library(gdata) matchcols but no luck. > > > > ______________________________________________ > > [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. > > -- > Chuck Cleland, Ph.D. > NDRI, Inc. > 71 West 23rd Street, 8th floor > New York, NY 10010 > tel: (212) 845-4495 (Tu, Th) > tel: (732) 512-0171 (M, W, F) > fax: (917) 438-0894 > ______________________________________________ [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. |
In reply to this post by RKoenker
--- roger koenker <[hidden email]> wrote: > it is the well-known wicked which problem: if you > had (grammatically > incorrectly) > thought "... which I want to change" then you might > have been led > to type (in another window): > > ?which > > and you would have seen the light. Maybe that() > should be an alias > for which()? One also has to understand which and I missed it. I don't think that which is really that grammatically incorrect anymore. Thanks > > url: www.econ.uiuc.edu/~roger Roger > Koenker > email [hidden email] Department of > Economics > vox: 217-333-4558 University of > Illinois > fax: 217-244-6678 Champaign, IL > 61820 > > > On Aug 2, 2006, at 4:01 PM, John Kane wrote: > > > Simple problem but I don't see the answer. I'm > trying > > to clean up some data > > I have 120 columns in a data.frame. I have one > value > > in a column named "blaw" that I want to change. > How do > > I find the coordinates. I can find the row by > doing a > > subset on the data.frame but how do I find out > here > > "blaw " is in columns without manually counting > them > > or converting names(Df) to a list and reading down > the > > list. > > > > Simple example > > > > cat <- c( 3,5,6,8,0) > > dog <- c(3,5,3,6, 0) > > rat <- c (5, 5, 4, 9, 0) > > bat <- c( 12, 42, 45, 32, 54) > > > > Df <- data.frame(cbind(cat, dog, rat, bat)) > > Df > > subset(Df, bat >= 50) > > > > ----results > > cat dog rat bat > > 5 0 0 0 54 > > > > > > Thus I know that my target is in row 5 but how do > I > > figure out where 'bat' is? > > > > All I want to do is be able to say > > Df[5,4] <- 100 > > > > Is there some way to have function(bat) return the > > column number: some kind of a colnum() function? > I > > had thought that I had found somthing in > > library(gdata) matchcols but no luck. > > > > ______________________________________________ > > [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. > > ______________________________________________ [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. |
In reply to this post by Chuck Cleland
On Wed, 02 Aug 2006 17:12:53 -0400, Chuck Cleland wrote:
> Why not do it this way? > > Df$bat <- replace(Df$bat, Df$bat >=50, 100) Is that any different, performancewise, than the following? Df$bat[Df$bat >= 50] <- 100 Gerald Jansen ... John Kane wrote: > Simple example > > cat <- c( 3,5,6,8,0) > dog <- c(3,5,3,6, 0) > rat <- c (5, 5, 4, 9, 0) > bat <- c( 12, 42, 45, 32, 54) > > Df <- data.frame(cbind(cat, dog, rat, bat)) ... ______________________________________________ [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. |
In reply to this post by jholtman
--- jim holtman <[hidden email]> wrote: > ?which > > > which(Df >= 50, arr.ind=T) > row col > 5 5 4 This works very nicely as has some other suggestions on how to replace a value. Assuming that I have more than one correction to make where Df >= 50, can I use vectors in the Df[] to do this. My attempt shows that I can use vectors but it appears thatthere is something wrong with my logic Eample cat <- c( 3,5,6,8,0) dog <- c(3,5,3,6, 0) rat <- c (5, 5, 4, 9, 51) bat <- c( 12, 42, 45, 32, 54) Df <- data.frame(cbind(cat, dog, rat, bat)) post <- which(Df >= 50, arr.ind=T) # find values .= 50 post correction <- c(77, 88) # new correct values row <- post[ ,1] # vector for row number col <- post[ ,2] # vector for column number Df[row,col] <- correction Df -------result--------- cat dog rat bat 1 3 3 5 12 2 5 5 5 42 3 6 3 4 45 4 8 6 9 32 5 0 0 88 88 I am replacing both instances with 88 which is not correct Thanks > On 8/2/06, John Kane <[hidden email]> wrote: > > > > Simple problem but I don't see the answer. I'm > trying > > to clean up some data > > I have 120 columns in a data.frame. I have one > value > > in a column named "blaw" that I want to change. > How do > > I find the coordinates. I can find the row by > doing a > > subset on the data.frame but how do I find out > here > > "blaw " is in columns without manually counting > them > > or converting names(Df) to a list and reading down > the > > list. > > > > Simple example > > > > cat <- c( 3,5,6,8,0) > > dog <- c(3,5,3,6, 0) > > rat <- c (5, 5, 4, 9, 0) > > bat <- c( 12, 42, 45, 32, 54) > > > > Df <- data.frame(cbind(cat, dog, rat, bat)) > > Df > > subset(Df, bat >= 50) > > > > ----results > > cat dog rat bat > > 5 0 0 0 54 > > > > > > Thus I know that my target is in row 5 but how do > I > > figure out where 'bat' is? > > > > All I want to do is be able to say > > Df[5,4] <- 100 > > > > Is there some way to have function(bat) return the > > column number: some kind of a colnum() function? > I > > had thought that I had found somthing in > > library(gdata) matchcols but no luck. > > > > ______________________________________________ > > [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. > > > > > > -- > Jim Holtman > Cincinnati, OH > +1 513 646 9390 > > What is the problem you are trying to solve? > ______________________________________________ [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. |
John Kane <[hidden email]> writes:
> --- jim holtman <[hidden email]> wrote: > > > ?which > > > > > which(Df >= 50, arr.ind=T) > > row col > > 5 5 4 > > This works very nicely as has some other suggestions > on how to replace a value. Assuming that I have more > than one correction to make where Df >= 50, can I use > vectors in the Df[] to do this. > > My attempt shows that I can use vectors but it appears > thatthere is something wrong with my logic > > Eample > > cat <- c( 3,5,6,8,0) > dog <- c(3,5,3,6, 0) > rat <- c (5, 5, 4, 9, 51) > bat <- c( 12, 42, 45, 32, 54) > > Df <- data.frame(cbind(cat, dog, rat, bat)) > post <- which(Df >= 50, arr.ind=T) # find values .= > 50 > post > correction <- c(77, 88) # new correct values > row <- post[ ,1] # vector for row number > col <- post[ ,2] # vector for column number > > Df[row,col] <- correction > Df > > -------result--------- > cat dog rat bat > 1 3 3 5 12 > 2 5 5 5 42 > 3 6 3 4 45 > 4 8 6 9 32 > 5 0 0 88 88 > > I am replacing both instances with 88 which is not > correct You're being bitten by two issues here: One is that Df[row,col] does not vectorize in parallel in the two indices: Df[1:2,1:2] has *four* elements, not two. Another is that data frames are not matrices: you can have different types of values in different columns, so you cannot expect to pick an arbitrary set of elements and assign a vector into it (well, it doesn't work, anyway). This sort of stuff works much easier with matrices, where we also have the wonderful feature of indexing with a matrix: > M <- cbind(cat, dog, rat, bat) > M[post]<- correction > M cat dog rat bat [1,] 3 3 5 12 [2,] 5 5 5 42 [3,] 6 3 4 45 [4,] 8 6 9 32 [5,] 0 0 77 88 -- O__ ---- Peter Dalgaard Ă˜ster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([hidden email]) FAX: (+45) 35327907 ______________________________________________ [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 <[hidden email]> wrote: > John Kane <[hidden email]> writes: > > > --- jim holtman <[hidden email]> wrote: > > > > > ?which > > > > > > > which(Df >= 50, arr.ind=T) > > > row col > > > 5 5 4 > > > > This works very nicely as has some other > suggestions > > on how to replace a value. Assuming that I have > more > > than one correction to make where Df >= 50, can I > use > > vectors in the Df[] to do this. > > > > My attempt shows that I can use vectors but it > appears > > thatthere is something wrong with my logic > > > > Eample > > > > cat <- c( 3,5,6,8,0) > > dog <- c(3,5,3,6, 0) > > rat <- c (5, 5, 4, 9, 51) > > bat <- c( 12, 42, 45, 32, 54) > > > > Df <- data.frame(cbind(cat, dog, rat, bat)) > > post <- which(Df >= 50, arr.ind=T) # find values > .= > > 50 > > post > > correction <- c(77, 88) # new correct values > > row <- post[ ,1] # vector for row number > > col <- post[ ,2] # vector for column number > > > > Df[row,col] <- correction > > Df > > > > -------result--------- > > cat dog rat bat > > 1 3 3 5 12 > > 2 5 5 5 42 > > 3 6 3 4 45 > > 4 8 6 9 32 > > 5 0 0 88 88 > > > > I am replacing both instances with 88 which is not > > correct > > You're being bitten by two issues here: One is that > Df[row,col] does > not vectorize in parallel in the two indices: > Df[1:2,1:2] has *four* > elements, not two. It took a moment to see it but it's rather obvious now. I'm still fuzzy on the differences in behaviour between a data frame and a matrix. > Another is that data frames are > not matrices: you > can have different types of values in different > columns, so you cannot > expect to pick an arbitrary set of elements and > assign a vector into > it (well, it doesn't work, anyway). > > This sort of stuff works much easier with matrices, > where we also have > the wonderful feature of indexing with a matrix: > > > M <- cbind(cat, dog, rat, bat) > > M[post]<- correction > > M > cat dog rat bat > [1,] 3 3 5 12 > [2,] 5 5 5 42 > [3,] 6 3 4 45 > [4,] 8 6 9 32 > [5,] 0 0 77 88 Which of course I, stupidly thought that I was doing in the data frame. Thank you very much. ______________________________________________ [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. |
In reply to this post by John Kane-2
You don't need to find out the column index. This works:
Df[5,'bat'] <- 100 -Don At 5:01 PM -0400 8/2/06, John Kane wrote: >Simple problem but I don't see the answer. I'm trying >to clean up some data >I have 120 columns in a data.frame. I have one value >in a column named "blaw" that I want to change. How do >I find the coordinates. I can find the row by doing a >subset on the data.frame but how do I find out here >"blaw " is in columns without manually counting them >or converting names(Df) to a list and reading down the >list. > >Simple example > >cat <- c( 3,5,6,8,0) >dog <- c(3,5,3,6, 0) >rat <- c (5, 5, 4, 9, 0) >bat <- c( 12, 42, 45, 32, 54) > >Df <- data.frame(cbind(cat, dog, rat, bat)) >Df >subset(Df, bat >= 50) > >----results > cat dog rat bat >5 0 0 0 54 > > >Thus I know that my target is in row 5 but how do I >figure out where 'bat' is? > >All I want to do is be able to say >Df[5,4] <- 100 > >Is there some way to have function(bat) return the >column number: some kind of a colnum() function? I >had thought that I had found somthing in >library(gdata) matchcols but no luck. > >______________________________________________ >[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. -- -------------------------------------- Don MacQueen Environmental Protection Department Lawrence Livermore National Laboratory Livermore, CA, USA ______________________________________________ [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. |
--- Don MacQueen <[hidden email]> wrote: > You don't need to find out the column index. This > works: > > Df[5,'bat'] <- 100 > > -Don > Thanks, I'd tried Df[5, bat] <- 100 :( I never thought of the ' ' being needed. > At 5:01 PM -0400 8/2/06, John Kane wrote: > >Simple problem but I don't see the answer. I'm > trying > >to clean up some data > >I have 120 columns in a data.frame. I have one > value > >in a column named "blaw" that I want to change. How > do > >I find the coordinates. I can find the row by doing > a > >subset on the data.frame but how do I find out here > >"blaw " is in columns without manually counting > them > >or converting names(Df) to a list and reading down > the > >list. > > > >Simple example > > > >cat <- c( 3,5,6,8,0) > >dog <- c(3,5,3,6, 0) > >rat <- c (5, 5, 4, 9, 0) > >bat <- c( 12, 42, 45, 32, 54) > > > >Df <- data.frame(cbind(cat, dog, rat, bat)) > >Df > >subset(Df, bat >= 50) > > > >----results > > cat dog rat bat > >5 0 0 0 54 > > > > > >Thus I know that my target is in row 5 but how do I > >figure out where 'bat' is? > > > >All I want to do is be able to say > >Df[5,4] <- 100 > > > >Is there some way to have function(bat) return the > >column number: some kind of a colnum() function? I > >had thought that I had found somthing in > >library(gdata) matchcols but no luck. > > > >______________________________________________ > >[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. > > > -- > -------------------------------------- > Don MacQueen > Environmental Protection Department > Lawrence Livermore National Laboratory > Livermore, CA, USA > -------------------------------------- > ______________________________________________ [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. |
On 8/3/06, John Kane <[hidden email]> wrote:
> > --- Don MacQueen <[hidden email]> wrote: > > > You don't need to find out the column index. This > > works: > > > > Df[5,'bat'] <- 100 > > > > -Don > > > > Thanks, I'd tried > Df[5, bat] <- 100 :( > > I never thought of the ' ' being needed. Right -- the quotes are not needed if you use $ but they are needed if you use [. ______________________________________________ [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. |
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