Hello useRs,
I have a problem at hand which I'd think is fairly common amongst
groups were R is being adopted for Analytics in place of SAS.
Users would like to obtain results for logistic regression in R that
they have become accustomed to in SAS.
Towards this end, I was able to propose the
Frank E Harrell Jr Professor and ChairmanSchool of Medicine
Department of Biostatistics Vanderbilt University
On Mon, 9 Aug 2010, Harsh wrote:
Hello useRs,
I have a problem at hand which I'd think is fairly common amongst
groups were R is being adopted for
On Mon, Aug 9, 2010 at 6:43 AM, Harsh singhal...@gmail.com wrote:
Hello useRs,
I have a problem at hand which I'd think is fairly common amongst
groups were R is being adopted for Analytics in place of SAS.
Users would like to obtain results for logistic regression in R that
they have become
Note that stepwise variale selection based on AIC has all the problems
of stepwise variable selection based on P-values. AIC is just a
restatement of the P-Value.
Frank
Frank E Harrell Jr Professor and ChairmanSchool of Medicine
Department of Biostatistics
In the trivial case where all candidate predictors have one degree of
freedom (which is unlikely as some things will be nonlinear or have
2 categories), adding a variable if it increases AIC is the same as
adding it if its chi-square exceeds 2. This corresponds to an alpha
level of 0.157
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