Posts Tagged ‘ 13 ’

Whassup with glm()?

May 4, 2011
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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....

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Could someone please set this as the new R default in base graphics?

October 29, 2010
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par (mar=c(3,3,2,1), mgp=c(2,.7,0), tck=-.01) Thank you....

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Getting arm and lme4 running on the Mac

October 17, 2010
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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...

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Contest for developing an R package recommendation system

October 7, 2010
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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... ...

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Ross Ihaka to R: Drop Dead

September 13, 2010
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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...

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R vs. Stata, or, Different ways to estimate multilevel models

September 10, 2010
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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...

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The future of R

September 8, 2010
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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...

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Multiple Imputation with Diagnostics (mi) in R: Opening Windows into the Black Box

June 26, 2009
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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: ...

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What is faster, Winbugs or Openbugs?

July 14, 2008
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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?...

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If you don’t use R to fit multilevel models, there’s no point in reading this one

October 6, 2007
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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:...

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