I found a work-around by just simply getting the sum of the conditional values and dividing this by the mean. It's not elegant but it works
On Aug 13, 3:11 pm, Dax <rienk.doet...@gmail.com> wrote: > 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-h...@r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://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.
