that's not a problem of {}. By using {} you can put the command in one line. Still you can put the command in several lines as well by pur "enter". That's why in the second line, the ">" becomes "+"....
thank you for your reply though. saji ----- ------------------------------------------------------------------ Saji Ren from Shanghai China GoldenHeart Investment Group ------------------------------------------------------------------ -- View this message in context: http://r.789695.n4.nabble.com/How-to-perform-a-substitution-in-a-loop-tp2325048p2325075.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.