One small thing that would be very nice for baseline-constraint (R
calls them treatment for some reason) factor variables would be an
option to specify which category is baseline. This would be extremely
useful in experimental contexts, especially medicine. For the moment,
I have to permute categories so that the control (placebo) is code 1.
I realize that contrasts() could be used for this but that is
complicated for a simple problem. I am not sure just what functions
would require the option: gl, factor, as.factor, ...
  Jim
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