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.

Reply via email to