> I would generally use the coef() extractor function if > it's available (and it is for nls()). ?nls has an example: > > coef(summary(fm1DNase1))
I knew about coef() on model objects, but I did not know it had methods for their summaries. What wonderful information! Josh > > which is a matrix from which you can get the SEs: > > coef(summary(fm1DNase1))[,"Std. Error"] > > or > > coef(summary(fm1DNase1))[, 2] > > Schatzi, > As to your other question about 'adding two parameters', that > doesn't make sense to me. Can you provide a sensible example? > In any case you would no doubt have to look at the covariance > matrix of the parameter estimates (with vcov()). > > Peter Ehlers ______________________________________________ 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.
