st: combine two graphs of kernel local polynomial

[Ana Gabriela Guerrero Serdan <ag_guerreroserdan@yahoo.com>]

Dear all, 

I want to do a graph of two kernel local polynomial smoothing regressions. 

I have done the following: 

.lpoly zscoresha2 Ageinmonths if treated==1 [aweight= expweigh], noscatter ci
.graph copy Graph treated=1
.lpoly zscoresha2 Ageinmonths if treated==0 [aweight = expweigh], noscatter ci
.graph copy Graph nontreated
.graph combine treated nontreated, ycommon xcommon


But I get two graphs next to each other. I see the same query in Statalist but for twoway graphs. How can I combine the kernel polynomial graphs into one? 

Thanks, 

Gaby 



----------------------------
Gaby Guerrero Serdán 

Department of Economics
Royal Holloway, University of London
TW20 OEX
Egham, Surrey
England, UK
http://www.rhul.ac.uk/Economics/For-Staff/postgrads.html

http://ag.guerreroserdan.googlepages.com/gabyguerrero%27swebpage
http://www.flickr.com/photos/49939890@N00/show/



      

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