[R] Translating lm.object to SQL, C, etc function
j+rhelp at howard.fm
Sat Feb 15 04:40:03 CET 2003
On Fri, 14 Feb 2003 07:53:46 -0500, "John Fox" <jfox at mcmaster.ca> said:
> I've written replacements for the standard R contrast functions that
> produce the kind of more easily parsed (and more readable) contrast names
> that I think you have in mind. I intend to include these in the next
> release of the car package for R but haven't done so yet. Since the code
> isn't very long, I've appended it (and the .Rd documentation file to this
> note). Note that R does separate terms in an interaction with a colon.
> I hope that this does what you need.
> ## Coefficients:
> ## (Intercept) income education
> ## 2.275753 0.003522 1.713275
> ## type[T.prof] type[T.wc] income:type[T.prof]
> ## 15.351896 -33.536652 -0.002903
> ## income:type[T.wc] education:type[T.prof] education:type[T.wc]
> ## -0.002072 1.387809 4.290875
Yes, it's perfect. Thanks so much (and also thanks for your really
readable and useful book, including web appendices)!
jhoward at fastmail.fm
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