>If you're on Windows, you >need to have some tools installed to be able to do that (but you haven't >said what OS you're using).
Yes, I forgo tto say that my OS is Windows. Regards, Marco Tommasi ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html