Homework exercise ?? -- Bert
On Tue, Jan 18, 2011 at 2:03 PM, Denis Kazakiewicz <d.kazakiew...@gmail.com> wrote: > > Hi > > Trying to work out that: > Each person can take from 1 to 9 drugs. And data frame looks like > > > id drug > 1 d > 2 g > 2 d > 2 r > 3 e > 3 a > ........... > > Q: How many drugs one person takes on average? > > Thank you > > ______________________________________________ > 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. > -- Bert Gunter Genentech Nonclinical Biostatistics ______________________________________________ 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.
