> Note that although ddply does a lot for you, it doesn't reproduce all of > your calculations on all of the data columns like summaryBy does... you have > to explicitly create every calculated column in your function.
Well, ddply doesn't, but colwise will. Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/ ______________________________________________ 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.
