> On Jun 15, 2016, at 11:10 AM, Patrizio Frederic <frederic.patri...@gmail.com> > wrote: > > Dear R-users, > I've a problem that puzzle me > > suppose I have a two way contigency table > > a <- sample(al <- letters[1:10],100,T) > b <- sample(bl <- LETTERS[1:5],100,T) > ab <- cbind(a,b) > > ddd <- (xtabs(data = ab)) > ddd <- as.matrix(ddd) > > the question is: how do I reverse the code, thus how do I get raw data > (object ab) from ddd? > > I've tried > > as.data.frame.table(ddd) > > which is not the answer I'm looking for. > Thanks in advance, > > PF
Hi, There is a function called expand.dft(), which I posted some years ago, which is a modification of a prior version, posted a few years before that. The updated version is here: https://stat.ethz.ch/pipermail/r-help/2009-January/378521.html If memory serves, that code has made its way into one or more packages on CRAN but I don't recall which at the moment. Regards, Marc Schwartz ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
