contrast package with interactions in gls model

Thanks.  The reason I responded that way is that the error message mentioned
a function gendata that is in the rms and Design packages.  I guess it's in
the contrast package too.
Frank

Hi,

Sorry! I fited model with gls of nlme package. And I trying to contrast
interaction with function contrast of contrast package.

I thanks for your reply,

Regards.

Marylin Bejarano

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Frank Harrell
Department of Biostatistics, Vanderbilt University
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