From thomas@biostat.washington.edu  Thu Dec  4 17:41:09 1997
From: thomas@biostat.washington.edu (Thomas Lumley)
Date: Thu, 4 Dec 1997 09:41:09 -0800 (PST)
Subject: R-alpha: model.matrix(.) does not allow `contrasts' ..
In-Reply-To: <199712041723.SAA05244@sophie.ethz.ch>
Message-ID: <Pine.LNX.3.96.971204093835.5784A-100000@buffy>

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.

	-thomas

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R-alpha: model.matrix(.) does not allow `contrasts' ..
Thomas Lumley