probelm solved: data <- read.table("pdvspt.txt", header = T, dec = ",") It was the coma, now I have everything in numeric. Thanks a lot for the support! Ale -- View this message in context: http://r.789695.n4.nabble.com/as-integer-tp2245987p2246989.html Sent from the R help mailing list archive at Nabble.com.