[R] Fitting a model with an offset in bigglm

[Richard Jacques]

Dear all,

I have a large data set and would like to fit a logistic regression 
model using the bigglm function.  I need to include an offset in the 
model but when I do this the bigglm function seems to ignore it.

For example, running the two models below produces the same model and 
the offset is ignored

bigglm(y~x,offset=z,data=Test,family=binomial(link = "logit"))
bigglm(y~x,data=Test,family=binomial(link = "logit"))

Is it possible to fit an offset using bigglm? And if so, what am I doing 
wrong?

Thanks,

Richard

-- 
Dr Richard Jacques
Medical Statistics Group
School of Health and Related Research
University of Sheffield
Regent Court
30 Regent Street
SHEFFIELD
S1 4DA