Hi Baptiste! Grand-grand merci!!! It works!
Thanks! Alex 2010/12/7 baptiste auguie <baptiste.aug...@googlemail.com>: > baptiste ______________________________________________ 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.