R-beta: offset code in glm....
mikem at stat.cmu.edu
Wed Jun 3 21:34:50 CEST 1998
I'm trying delve into the offset code in glm, and I have to admit I'm getting
My particular concern is that if you do something like
glm( fred ~ wilma, offset=barney, data=betty)
then the offset is not found if barney is a component of the data frame
betty. (If you do the same thing with weights, then the weight is found in the
I don't know if this is a design decision, and I can't follow the logic of the
I'm willing to try to fix the behaviour of the offset code, but I could use
some help understanding what all the current code. In particular is the
(which seems to play with offsets?) used anywhere.
Mike Meyer, Department of Statistics, Carnegie Mellon University
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