[R] grouping residuals

Jeff D. Hamann jeff_hamann at hamanndonald.com
Sat Feb 9 01:43:28 CET 2002


I would like to test if a model is bias by grouping residuals into
categroies and testing if the mean of the residuals for the group is
different from zero. Since I'm a little new to R programming, what is the
best way to group residuals, say into n groups over the predicted values. I
could use a loop, but I have a feeling that there is a method like symnum
that would do the trick. Yes?


Jeff.


Jeff D. Hamann
Hamann, Donald & Associates, Inc.
PO Box 1421
Corvallis, Oregon USA 97339-1421
Bus. 541-753-7333
Cell. 541-740-5988
jeff_hamann at hamanndonald.com
www.hamanndonald.com


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