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Re: st: How to plot a mkspline regression?


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: How to plot a mkspline regression?
Date   Thu, 11 Feb 2010 00:18:11 -0800 (PST)

--- On Thu, 11/2/10, Christian Weiss wrote:
> I am estimating a piecewise regression (dependent var: a,
> independent variables xyz) using mkspline.
> 
> Do you have any hint what's the most convenient way
> plotting the results of the regression in a linechart (e.g.
> using a and x)?

*--------------------- begin example --------------------
sysuse auto, clear
mkspline mpg1 20 mpg2 = mpg
reg price mpg? foreign rep78
margins, at(foreign=0 rep78=3) over(mpg)

preserve 
gen byte touse = e(sample)
bys touse mpg : keep if _n == 1 & touse
sort mpg
keep mpg
matrix b = r(b)'
svmat b
twoway line b mpg , ///
title(predicted price for US cars with average repair status)
restore
*--------------------- end example --------------------------
( For more on how to use examples I sent to statalist see:
 http://www.maartenbuis.nl/stata/exampleFAQ.html )

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------


      

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