Hi all, Suppose I have a formula: a = log(y) ~ x1 + I(x2^2)
How can I extract the original variable names 'y', 'x1', 'x2' from this formula? Thanks a lot! Regards, Yihui -- Yihui Xie <xieyi...@gmail.com> Phone: 515-294-6609 Web: http://yihui.name Department of Statistics, Iowa State University 3211 Snedecor Hall, Ames, IA ______________________________________________ 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.
