hi, jholtman
its true, the problem was to iniciate the list at the second level. thx a lot -- View this message in context: http://r.789695.n4.nabble.com/automatically-generate-the-output-name-of-my-for-loops-tp3592160p3594397.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.