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model.matrix() and lm() for nested factors
Saul Sternberg
·
Nov 21, 2010
·
r-help
To R-help list: I would like to use lm() and lmRob() to estimate the parameters of a fixed-effects model that includes nested factors with unequal numbers of levels, in some cases without also including the nesting factor in...
Wrong contrast matrix for nested factors in lm(), rlm(), and lmRob()
Saul Sternberg
·
Dec 13, 2010
·
r-help
This message also reports wrong estimates produced by lmRob.fit.compute() for nested factors when using the correct contrast matrix. And in these respects, I have found that S-Plus behaves the same way as R. Using the three available...
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