> have you read the docs? Yes, I'm reading the manual "An Introduction to R"..
> start with ?`[` Ok...I haven't read it. Thanks. Alfredo ______________________________________________ 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.