Hi Stat, Make sure you have read the example in >?apply
after that, if you still have more questions, try to be as specific as you can and provide an example. best, dror -- View this message in context: http://r.789695.n4.nabble.com/function-tp3168116p3168338.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.