?length --- On Thu, 8/13/09, Dax <rienk.doet...@gmail.com> wrote:
> From: Dax <rienk.doet...@gmail.com> > Subject: [R] How to get the n (number of observations) per conditional group > To: r-help@r-project.org > Received: Thursday, August 13, 2009, 10:11 AM > Hello all, > > I have a huge data set that I'm cleaning up a bit. I am > extracted the > means per condition, but also need to get the n. Strangely > enough I am > unable to find a function that could actually pull this > off. I am > unable to use replications or count the rows using nrow. > > What I am trying to obtain is the number of observations > fitting > something along the lines of > "data$total[data$spp==1&data$gyro==1&data > $salinity==0&data$day==i]" > > Can anyone help me? > > ______________________________________________ > 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. > __________________________________________________________________ [[elided Yahoo spam]] ______________________________________________ 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.
