Hello, Here is the data set I am working with: dat=read.csv('http://dl.dropbox.com/u/1852742/relexpressions.csv') names(dat)
#Under the 'target' column, I want to change all of the values into all capital letters (e.g. fgf2 becomes FGF2). I have taken a loop approach but I think my Python background is confusing me. Here is what I attempted: for(line in dat[,1]){if(line=='fgf2'){line<-'FGF2'}} #I made sure that it was looping through each line by entering: for(line in dat[,1]){if(line=='fgf2'){print(line)}} #Which did exactly what I thought it would. #This doesn't change anything, though. Also, after reading the documentation I am still confused how to add multiple "if" statements. I would need that because I need to change the names of fgf2, fgf7, and fgf10. #I am sure there is a built-in function to do what I need, but I haven't found it yet so I tried this loop method. Any help is greatly appreciated! Jahan ______________________________________________ R-help@r-project.org 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.