2016-07-13 20:09 GMT+02:00 Jeff Newmiller <jdnew...@dcn.davis.ca.us>: > The formula interface as used in lm and nls searches for separate > coefficients for each variable.. it will take someone more clever than I to > figure out how to get the formula interface to think of two variables as > instances of one factor. > > However, R can do nonlinear optimization just fine: ...
Hello Jeff, hello all, thank you. This appears to be what I was looking for. Is there a straightforward way to test for significance ? THX, stn ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.