On Thu, Aug 9, 2012 at 5:30 PM, arun <smartpink...@yahoo.com> wrote: > > lapply(1:length(a$c),function(x) a$b[x]-a$c[[x]])
Arun, I've seen you use this idiom a few times lately and I'd just like to note that seq_along() is an (underutilized) primitive and a safer and faster alternative (avoiding the pathological length(x) = 0 case). Cheers, Michael ______________________________________________ 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.
