From bates@stat.wisc.edu  Thu Jun 18 22:52:38 1998
From: bates@stat.wisc.edu (Douglas Bates)
Date: Thu, 18 Jun 1998 16:52:38 -0500 (CDT)
Subject: minor incompatibility in model.matrix
Message-ID: <m0ymmbm-0000c2C@verdi.stat.wisc.edu>

The S and S-PLUS versions of model.matrix will ignore elements of a
contrasts argument that do not correspond to factors.  R does not.  It
produces and error of
 Error: contrasts apply only to factors
even if the contrasts themselves are NULL.
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-devel-request@stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._


minor incompatibility in model.matrix
Douglas Bates