Re: st: how to get a two-line-graph for predicted probabilites in logistic regression model with a metric controll variable (SE10)

["Prof. Dr. Claudia Schuchart" <schuchart@uni-wuppertal.de>]

Hi Maarten,
sorry for sending to you a private email - I just have read pt6 of 
Statalist FAQ.
My problem is, that the twoway-command does not work and I could not 
find out a solution:
. twoway rarea lb ub south if union == 0, astyle(ci) ||    ///
(...)
/ / / is not a twoway plot type
r(198);
 .        rarea lb ub south if union == 1, astyle(ci2) ||   ///
unrecognized command:  rarea
r(199);
 .        line pr south if union == 0 ||                    ///
/ / / is not a twoway plot type
r(198);
.        line pr south if union == 1,                      ///
option / not allowed
r(198);
.        legend(order(1 "95% CI" 3 "union" 4 "non-union")) ///
unrecognized command:  legend
(...)
Thank you,
Claudia

Am 5/29/2013 10:23 AM, schrieb Maarten Buis:
> For older versions of Stata you can use the -adjust- command for that like so:
>
> *------------------ begin example ------------------
> sysuse nlsw88, clear
> xi: logit married age i.south*i.union
>
> preserve
> adjust age, by(south union) ci replace pr
> twoway rarea lb ub south if union == 0, astyle(ci) ||    ///
>         rarea lb ub south if union == 1, astyle(ci2) ||   ///
>         line pr south if union == 0 ||                    ///
>         line pr south if union == 1,                      ///
>         legend(order(1 "95% CI" 3 "union" 4 "non-union")) ///
>         scheme(s2color) ylab(,angle(horizontal))          ///
>         xlab(0 "North" 1 "South")                         ///
>         xtitle(area of residence)                         ///
>         ytitle(predicted probability of being married)
> restore
> *------------------- end example -------------------
> (For more on examples I sent to the Statalist see:
> http://www.maartenbuis.nl/example_faq )
>
> Hope this helps,
> Maarten
>
> On Tue, May 28, 2013 at 3:53 PM, Prof. Dr. Claudia Schuchart wrote:
> > I did a graph with SE10 for predicted probabilites in a logistic regression
> > model. I controlled for intelligence (metric), and considered two indendent
> > binary vaiables as well as the interaction between them (N=187). I want to
> > have a two-line-graph (holding intelligence constant), instead I got
> > multiple graphs for any intelligence value:
> >
> > xi: logit y i.a*i.b IQ
> > predict y, pr
> > separate y, by(b)
> > graph twoway line y0 y1 a , xlabel(1 2)
> >
> > How can I get  a two line graph only?
> ---------------------------------
> Maarten L. Buis
> WZB
> Reichpietschufer 50
> 10785 Berlin
> Germany
>
> http://www.maartenbuis.nl
> ---------------------------------
> *
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--
*****************************************************
Prof. Dr. Claudia Schuchart
Lehrstuhl für Empirische Bildungsforschung
Leiterin Forschungsgruppe Schule und Bildung

Bergische Universität Wuppertal
School of Education
Institut für Bildungsforschung
Gaußstr. 20
D-42119 Wuppertal

Fon (Sekretariat): 0049/ 202 439 2325
Fon (direkt): 0049/ 202 439 3329
Fax: 0049/ 202 439 3681
Raum   S. 15.28
*****************************************************

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