R-alpha: model.matrix(.) does not allow `contrasts' ..
Thu, 4 Dec 1997 09:41:09 -0800 (PST)
On Thu, 4 Dec 1997, Martin Maechler wrote:
> and this breaks multinom from the nnet library
> [yes, Kurt, I'm working on that and I'll send you patches..]
> Is this a bug or an (half-)intentional difference to S ?
I think it's a bug -- you should be able to specify contrasts on a
model-by-model basis if you really want to. Fortunately it's very rare
for people to use this feature.
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