On Thu, 9 Oct 2008, useR wrote:
Hi R helpers,
I'm fitting large number of single factor logistic regression models
as a way to immediatly discard factor which are insignificant.
Everything works fine expect that for some factors I get error message
"Singular information matrix in lrm.fit" which breaks whole execution
loop... how to make LRM not to throw this error and simply skip
factors with singularity problem...
?try
alternative solution also appreciated.
did you mean 'lrm' ?
penalty = 0.0 is the default for lrm(). Use a small, positive value.
Or use a score test, which for a single factor model could be obtained
from lm(), IIRC.
HTH,
Chuck
Thanks
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Charles C. Berry (858) 534-2098
Dept of Family/Preventive Medicine
E mailto:[EMAIL PROTECTED] UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901
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