I think you're looking for xtabs [see the examples; they're quite good] but I can't be sure: your printed object can't really exist in R so I'm not sure what you have currently.
Michael On Wed, May 30, 2012 at 3:25 PM, cassiorx <cassiodo...@hotmail.com> wrote: > I have a data frame that has columns Semester, Student ID (SID), Subject, > Grade, Devel (Tor F). Students can have multiple records within a semester. > Right now, the columns are not considered factors. > > I want to do an analysis that would show the number of students who received > particular combinations of grades. I also need to distinguish between the > two Development levels (they modify classes, not students), but first things > first. > Grade > Semester Count A B C D F other > S1 17 1 2 0 0 0 0 > 49 1 1 1 0 0 0 > 112 0 0 0 0 0 2 > etc. > > I can do this procedurally but that leads to a life of trouble and ugly > code. Your help deeply appreciated to do this in a r way. > > > -- > View this message in context: > http://r.789695.n4.nabble.com/data-frame-to-frequencies-tp4631859.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. ______________________________________________ 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.
