Milton Cezar Ribeiro wrote:
> Dear all,
>
> I am adjusting a Logistic Regression Model using lmr() function of
> Hmisc/Design package. Now I would like to compute AIC for this model. How can
> I do that?
>
> Kind regards,
>
> miltinho
> Brazil
I like to change AIC to have it on the chi-square scale. For that you
can do
aic <- function(fit)
round(unname(fit$stats['Model L.R.'] - 2*fit$stats['d.f.']),2)
f <- lrm( )
aic(f)
If unname doesn't exist in S-Plus as it does in R, you can remove that part.
--
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University
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