R help - Nov 2005 - extracting values with $

Hello R friends!

I´ve come acooss two problems during my work

1.) I would like to extract only certain values (such as R2 and C ) from the
output of several models based on a logistic regression

modela<-lrm(y~x1+x2+x3) , modelb<-lrm(y~x2+x5+x9)...
> modela$coef #works fine, not so 
> modela$R2 
>NULL
#or
>modela§C:
>NULL
Does anyone know where the mistake lies?

2. Can I use the apply function to display results of several models in one shot
without having to use the matrix function?

Thanks in advance

Christian

 

 



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