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Re: bug in covariance.c/categoricals.c

From: John Darrington
Subject: Re: bug in covariance.c/categoricals.c
Date: Thu, 16 Jun 2011 13:58:15 +0000
User-agent: Mutt/1.5.18 (2008-05-17)

On Thu, Jun 16, 2011 at 09:49:01AM -0400, Jason Stover wrote:
     On Sun, Jun 12, 2011 at 08:42:23PM +0000, John Darrington wrote:
     > You're right.  It's a problem of semantics.  The current implementation
     > encodes each categorical variables into N columns, where N is the number
     > of distinct values.  For the covariance matrix we require N - 1 columns.
     > Can you try the attached patch.  I think it will solve your problem.
     > (It causes all the ONEWAY tests to fail but we can think about that 
     That worked.
Great!  We'll have to think of something better for a long term fix.  But if 
you can work with it for now, we'll decide on the best approach when necessary.


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