Hi all,

I am looking to fit a logistic regression using the lrm function from the Design library. I am interested in this function because I would like to obtain "pseudo-R2" values (see http://tolstoy.newcastle.edu.au/R/help/02b/1011.html).

Can anyone help me with the syntax? 

If I fit the model using the stats library, the code looks like this:
model <- glm(x$trait ~ x$PC1 + I((x$PC1)^2) + I((x$PC1)^3), family = binomial)

What would be the equivalent syntax for the lrm function?

Thanks very much in advance,
-----------------------------------
Josh Banta, Ph.D
Center for Genomics and Systems Biology
New York University
100 Washington Square East
New York, NY 10003
Tel: (212) 998-8465
http://plantevolutionaryecology.org



      
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