

Hi,
I would like to compare several Generalized Linear Models on the basis of BIC. 
My models have a binary response variable and are fitted with the glm function. AIC works well, not so BIC
I tried: 
testBIC<-glm(y~x1+x2+x3,binomial)
> BIC(testBIC)
Error in log(x) : Non-numeric argument to mathematical function
>BIC(logLik(testBIC))
Error in log(x) : Non-numeric argument to mathematical function

I guess "logLik" does not do the trick because the glm class has already methods for this function. 
Is there anybody who can help me?
Thanks Christian



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