> I noticed Max already pointed you to the caret package. > > Load the library and look at the help for the createFolds function, eg: > > library(caret) > ?createFolds
I think that the createDataPartition function in caret might work better for you. There are a number of other packages with similar functions. Max ______________________________________________ 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.