termplot
Dear Bob, Take a look at the effects package, described in <http://www.jstatsoft.org/v08/i15/paper>. I hope this helps, John ------------------------------ John Fox, Professor Department of Sociology McMaster University Hamilton, Ontario, Canada web: socserv.mcmaster.ca/jfox
-----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On
Behalf Of Robert Michael Inman Sent: January-19-09 8:17 AM To: r-help at r-project.org Subject: [R] termplot I have used glm and stepAIC to choose a best model. I can use termplot to assess the contribution of each explanatory variable in the glm. However the final model after running stepAIC includes interaction terms, and when
I
do termplot I get "Error in `[.data.frame`(mf, , i) : undefined columns selected". I also see the termplot detail saying "Nothing sensible
happens
for interaction terms." Is it possilbe to determine explanatory power of final set of variables
when
interactions are included? Thanks - Bob
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