Here you will find daily news and tutorials about R, contributed by over 573 bloggers.
There are many ways to follow us - By e-mail:On Facebook: If you are an R blogger yourself you are invited to add your own R content feed to this site (Non-English R bloggers should add themselves- here)

(This article was first published on fishR » R, and kindly contributed to R-bloggers)

A fishR user asked me if I had Weisberg Linear Growth Model (LGM) vignette. In the past, the Weisberg LGM referred to the fixed-effects models described in Weisberg (1993) and implemented in software that was written in XLISP-STAT and distributed through Minnesota Sea Grant. [I do, actually, have a vignette that implements that technology in R but I do not distribute it because it is out-dated.] More recently, however, Weisberg et al. (2010) described a mixed-effects model for fish growth. I have not yet developed a vignette for these models but, fortunately, Dr. Weisberg uses those models as examples in his classes at the University of Minnesota. Thus, available at his website, is a detailed example with corresponding R code.

At some point I would like to develop some helper functions for the FSA package to streamline some of the analysis in his example. At that time, I will develop a more detailed vignette. However, this is unlikely for the near future.