>> Forgive the newbie question, I want to select random rows from my >> data.frame to create a test set (which I can do) but then I want to >> create a training set using whats left over. >>
The caret package has a function, createDataPartition, that does the split taking into account the distribution of the outcome. This might be good in classification cases where one or more classes have low percentages in the data set. There is more detail in the pdf: http://cran.r-project.org/web/packages/caret/vignettes/caretMisc.pdf and examples in this pdf http://cran.r-project.org/web/packages/caret/vignettes/caretTrain.pdf 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.
