Greetings
Unfortunately, "postgr3" is kind of a brain dead little program (I
wrote it, so I would know :) ), and this sounds beyond its
capabilities. But, you might be able to trick it by centering each
covariate across the years, but you would have to ask yourself if you
are adjusting for the "between year" variation and whether you wish to
do that. If not, I think that you would need to manually compute the
predicted probabilities because postgr3 wont do that.
Best luck,
Michael
On 1/9/07, Stijn Ruiter <[email protected]> wrote:
Dear all,
I tried to make a graph using postgr3, but did not succeed plotting
expected probabilities (estimated with logit) by a specific variable
(say, Z) holding all other variables at the group mean given Z. Using
the x() option followed by rest(grmean) allows to hold the other
variables constant at the group mean given X, but this is not what I
intended to do.
More specifically, I want to plot expected probabilities over time (so,
"postgr3 year") holding all covariates constant at the year-specific
means. Is this somehow possible?
Kind regards,
Stijn
--
Stijn Ruiter
Department of Sociology
Radboud University Nijmegen
P.O. Box 9104
6500 HE Nijmegen
Netherlands
Phone: + 31 24 361 2272
Fax: + 31 24 361 2399
Visiting address:
Thomas van Aquinostraat 4.01.74
Nijmegen
website: http://oase.uci.ru.nl/~sruiter
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