Hi, the contributed package 'drc' allows specification of non-linear regression models with individual parameter models that include covariates.
For an example see section 8 the accompanying paper in J. Statist. Software (http://www.jstatsoft.org/v12/i05/v12i05.pdf). Christian ______________________________________________ [email protected] 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.
