Thanks jholtman! But I'm not sure what and where I should change my code... :( wekt_n = ndf[i,] wekt_n_ok = wekt_n[!is.na(wekt_n)] If before this line I should change "wekt_n_ok" as numeric? but if I wrote as.numeric(wekt_n_ok) it's also not correct
and I also don't understand why "wekt_n_ok" is not numeric? -- View this message in context: http://www.nabble.com/Error%3Anon-numeric-argument-in-my-function-tp23807218p23807873.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.