On Sep 29, 2005, at 1:13 PM, Nick Cox wrote:
I think that -contract- leading to -glm- is indeed the
best route. One of the details of -contract-, the -zero-
option, was included with this very task in mind.
Thank you very much for such a quick reply.
I am not clear on the difficulty with pweights. Can't
you just include the weight variable in the list supplied
to -contract-? I don't think you need a separate handle
to treat them differently.
The contract help page and book says that only fweights are allowed.
When I try with my weight (which is not integer), I get the following
error messages:
. contract cigever alcever mjever [weight=analwt_c], freq(count)
(frequency weights assumed)
may not use noninteger frequency weights
r(401);
. contract cigever alcever mjever [pweight=analwt_c], freq(count)
pweight not allowed
r(101);
. contract cigever alcever mjever [fweight=analwt_c], freq(count)
may not use noninteger frequency weights
r(401);
Am I calling it incorrectly or misunderstanding something else?
Brian
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