We're having problem with starting values in glm(). A very simple logistic regression with just an intercept with a very simple starting value (beta=5) blows up....

We're having problem with starting values in glm(). A very simple logistic regression with just an intercept with a very simple starting value (beta=5) blows up....

par (mar=c(3,3,2,1), mgp=c(2,.7,0), tck=-.01) Thank you....

Our "arm" package in R requires Doug Bates's "lme4" which fits multilevel models. lme4 is currently having some problems on the Mac. But installation on the Mac can be done; it just takes a bit of work. I have two...

After I spoke tonight at the NYC R meetup, John Myles White and Drew Conway told me about this competition they're administering for developing a recommendation system for R packages. They seem to have already done some work laying out... ...

Christian Robert posts these thoughts: I have been worried for some time that R isn't going to provide the base that we're going to need for statistical computation in the future. (It may well be that the future...

Cyrus writes: I was teaching a class on multilevel modeling, and we were playing around with different method to fit a random effects logit model with 2 random intercepts---one corresponding to "family" and another corresponding to "co...

Some thoughts from Christian, including this bit: We need to consider separately 1. R's brilliant library 2. R's not-so-brilliant language and/or interpreter. I don't know that R's library is so brilliant as all that--if necessary, I don't thi...

Our article (by Yu-Sung, Jennifer, Masanao, and myself, and based also on work with Kobi, Grazia, and Peter Messeri) will be appearing in the Journal of Statistical Software, in a special issue on missing-data imputation. Here's the abstract: ...

Sandra McBride writes: My current model (in Winbugs) runs very slowly on my very slow laptop, so I am getting a new desktop. Here are some questions in the hopes of speeding up my model: Is Winbugs or Openbugs multithreaded?...

David Afshartous writes, What is the difference between sim() and mcsamp(), if any? If there is a difference, what should I expect in terms of difference in results? My reply:...