Although the help file seems not to mention it, -xi3- is by
Michael Mitchell and Phil Ender of UCLA, and -postgr3-
is by Michael Mitchell.
Neither appears to be a member of Statalist at present,
so I'd recommend them emailing them directly for support.
I've not used either program myself, being among the very
simple-minded souls whose needs are met by -xi-.
Nick
[email protected]
Thanks. You are missing out, then. I emailed Dr. Mitchell directly as
well. Compared to R, Stata modeling statements make you work too hard.
For simpler tasks with only two-way interactions, xi is useful, but
even here it would be improved by access to the various coding schemes
available. Postgr3 is like your anovaplot program but works with most
Stata estimators. When coupled with xi3, which allows 3rd order
interactions and all the various regression coding schemes (effect,
helmert, adjacent, etc.), postgr3 makes graphical interpretation more
rapid, more consistent, and for me, more pleasurable. My guess is that
your "simple-mindedness" is made possible by your deeper experience and
coding skill.
