> ?formula in R 2.9.2 says in para 2: > "The %in% operator indicates that the terms on its left are nested > within those on the right. For example a + b %in% a expands to the > formula a + a:b. "
Ooops, missed that. So b %in% a = a:b, and that's what's meant by "different coding". Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/ ______________________________________________ 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.
