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Re: st: graphing rrr from mlogit


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: graphing rrr from mlogit
Date   Wed, 9 May 2007 21:41:45 +0100 (BST)

--- Naomi Spence <spencen@email.unc.edu> wrote:
> I am using a multinomial logit model to predict type of 
> violence--variable name "violence" with values 0=none,
> 1=psychological, 2=physical.  My main independent variable of
> interest is an index "malsum" that ranges from 0-12. 
> 
> I want a graph that depicts changes in "violence" with increasing
> values of "malsum."  I'm visualizing a graph with 3 lines--one for
> each outcome  category on "violence".  Ideally, I would like the y
> axis to show the relative risks (I'm using mlogit option rrr), but
> I'll settle for predicted probabilities. I have tried a few different
> things, but the best I can do gives me 3 separate graphs with 1 line
> each that I can "combine" to put them on one panel but I'd like to
> have the 3 lines on  the same graph.

*--------------- begin example ----------------
sysuse auto, clear
recode rep78 1/2=3
mlogit rep78 length foreign
prgen length, gen(pr) x(foreign=0) 

twoway line prp3 prp4 prp5 prx, /*
*/ yscale(range(0 1)) ylab(0(.25)1) /*
*/ ytitle("probability")
*------------- end example ------------------
(For more on how to use examples I sent to the Statalist, see:
http://home.fsw.vu.nl/m.buis/stata/exampleFAQ.html )

Hope this helps,
Maarten



-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


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