On Thu, 2007-12-06 at 09:45 -0800, mogra wrote: > I have huge data file, and I would like randomize just one column at a time , > is there any easy way? > > Thanks a lot.
If you just want to randomly <hint> sample <\hint> from a single column, _independent of the other columns_, you can use: DF$Column[sample(nrow(DF))] where DF$Column is the column of interest in your data frame 'DF'. If you want to randomly sample entire rows from 'DF', you can use: DF[sample(nrow(DF)), ] See ?sample for more information. HTH, Marc Schwartz ______________________________________________ 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.
