Hello. using the lm command, I always receive the error message "couldn't find the function "is"". Do you haven an idea, what that means?
Thanks for your help. Best regards. Kathrin L. ______________________________________________ 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.
