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2009 Apr 22
2
R-User groups in North America (SF, LA, NYC, Ottawa)
...ent: Parallel Computing with R using ParallelR at Microsoft SF HQ
Presenter: David M Smith (Revolutions Computing)
Organized by Jim Porzak <jporzak at tgn com> and yours truly
New York City
http://www.meetup.com/LAarea-R-usergroup/ (61 members)
Organized by Joshua Reich <josh at i2pi com>
Ottawa
https://stat.ethz.ch/mailman/listinfo/r-ug-ottawa
Organized by John Nash <nashjc at uottawa ca>
University of Oregon
http://www.fsl.orst.edu/R_users - (unknown if currently active)
Kenneth B. Pierce Jr.
ken.pierce <at> oregonstate edu
Houston:
Coming Soon...
2009 Mar 12
3
avoiding termination of nls given convergence failure
Hello. I have a script in which I repeatedly fit a nonlinear regression to
a series of data sets using nls and the port algorithm from within a loop.
The general structure of the loop is:
for(i in 1:n){
… extract relevant vectors of dependent and independent variables …
… estimate starting values for Amax and Q.LCP…