[R] glm predict on new data

From: dirknbr <dirknbr_at_gmail.com>
Date: Wed, 06 Apr 2011 14:17:05 -0700 (PDT)


I am aware this has been asked before but I could not find a resolution.

I am doing a logit

lg <- glm(y[1:200] ~ x[1:200,1],family=binomial)

Then I want to predict a new set

pred <- predict(lg,x[201:250,1],type="response")

But I get varying error messages or warnings about the different number of rows. I have tried data/newdata and also to wrap in data.frame() but cannot get to work.

Help would be appreciated.

Dirk.

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