[R] Logistic Regression

[fharrell@virginia.edu]

Soon it will have the fast backward stepdown method
I put in SAS in 1978 which I believe is in PROC
LOGISTIC today.  This will be in the Design library's
fastbw function, which works with many models, is
very fast, approximate but surprisingly accurate.
It is based on approximate Wald statistics.

Do note all the usual warnings about all stepwise methods.
They have incredible risks.

Frank Harrell


Stephen Arthur wrote:
> 
> Hi,
> 
> Does R support any of the 3 stepwise or 8 criteria
> methods for logistic regression and multiple linear
> regression that SAS supports?
> 
> If yes, could you give me some simple demostration
> code.
> 
> Thanks,
> 
> steve
> 
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-- 
Frank E Harrell Jr              Prof. of Biostatistics & Statistics
Div. of Biostatistics & Epidem. Dept. of Health Evaluation Sciences
U. Virginia School of Medicine  http://hesweb1.med.virginia.edu/biostat
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