many thanks to everybody... indeed it was simple, and i should have found the answer myself, since i DID read the R Data Import/Export manual... maybe it's the age :-)
Mihai Nica Jackson State University [[alternative HTML version deleted]] ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html