[R] Select some, but not all, variables stepwise

Frank Harrell f.harrell at vanderbilt.edu
Fri Nov 4 17:01:08 CET 2011

Why do any of that?  Those procedures are statistically invalid.

AndreE wrote:
> Thanks Francisco - I've actually realized that ?step can do pretty much
> exactly what I want.
> Andre

Frank Harrell
Department of Biostatistics, Vanderbilt University
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