?which > which(Df >= 50, arr.ind=T) row col 5 5 4
On 8/2/06, John Kane <[EMAIL PROTECTED]> 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. > > ______________________________________________ > [email protected] 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]] ______________________________________________ [email protected] 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.
