Re: st: Plotting several linear associations in one graph for comparison

[Maarten Buis <maartenlbuis@gmail.com>]

On Fri, Jul 13, 2012 at 2:42 PM, Amal Khanolkar wrote:
> - I've run some very basic and simple linear regression models to analyse associations between standardized birth weight and blood pressure, adjusting for confounders like birth year, current age, BMI, height etc.
>
> - The associations between birth weight and blood pressure are stratified by ethnicity (12 ethnic goups - thus 12 separate linear regression models). I see that the association between birth weight and blood pressure does differ in the various ethnic goups.
>
> - I would now like to plot the above associations in a single graph using different colours for the various ethnic groups for comparison.

*---------------- begin example ----------------
sysuse nlsw88, clear
reg wage i.race##c.grade i.union hours ttl_exp
preserve
replace union = 1
replace hours = 40
replace ttl_exp = 15
bys race grade : keep if _n == 1
predict yhat
separate yhat, by(race)
twoway line yhat1 yhat2 yhat3 grade
restore
*--------------- end example -------------------
(For more on examples I sent to the Statalist see:
http://www.maartenbuis.nl/example_faq )

Hope this helps,
Maarten

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


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

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/