On Sun, Apr 10, 2011 at 2:24 PM, Wendy <wendy2.q...@gmail.com> wrote: > Hi all, > > I have a huge matrix of TRUE/FALSE table like following, and I want to count > the number of TRUEs in each row. Instead of looping through each row and do > length(Z[Z==TRUE]), I am wondering if there is an easier way of doing this. > > [,1] [,2] [,3] > [1,]TRUE FALSE FALSE > [2,]FALSE TRUE TRUE >
rowSums(Z) Peter ______________________________________________ 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.
