Hi, I would like to open several tables with a loop, using something like : ----------------- $ ls 1.txt 2.txt 3.txt 4.txt $ R > for (i in 1:4) tabi<-read.table("i.txt") Error in file(file, "r") : unable to open connection In addition: Warning message: cannot open file `i.txt' ------------------ thanks for any help Tristan Lefebure