On Tue, May 5, 2009 at 3:03 PM, jwg20 <jason.gulli...@gmail.com> wrote: > > I have a data set that I'm trying to melt and cast in a specific way using > the reshape package. (I'll use the ff_d dataset from reshape so I don't have > to post a toy data set here. ) > > Lets say I'm looking for the interaction of treatment with each type of > "variable" in ff_d. Using the command below gets me this. Subject will get a > column and each treatment type by each variable will also get a column with > values for each. > > cast(ff_d, subject~treatment+variable) > subject 1_potato 1_buttery 1_grassy 1_rancid 1_painty 2_potato 2_buttery > .... 3_painty > 1 3 18 18 18 18 18 18 18 > .... 18 > ... > > Now, if I want to look at just the the values for each variable by subject > I can run the following command. > cast(ff_d, subject~variable) > subject potato buttery grassy rancid painty > 1 3 54 54 54 54 54 > ... > > What I'm wondering now, is run one cast() call and get both of these in one > data.frame? Essentially, the values for each separate "condition" and > interactions between them? cast() doesn't let me repeat variable names as > that's what I first tried. Right now, i'm just running two separate cast() > calls and cbinding/merging them together. Is there a better way?
Have a look at the margins argument. Hadley -- 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.
