--- [email protected] wrote:
> Do you know how to take the "liberals" and view a histogram of only
> their income, and then superimpose it on the general population
> income?
Histograms aren't really well suited for this, have a look at
-kdensity- like in the extension of the example I sent earlier:
*-------------- begin example --------------
sysuse nlsw88, clear
sum tenure, detail
local top25 = r(p75)
replace wage = -wage /*just to make sure the
top 25 % of tenure measures something similar
to the bottom 25% of wage, you shouldn't do
this in you data*/
sum wage, detail
local bottom25 = r(p25)
gen liberal = tenure >`top25' & wage < `bottom25' /*
*/ if !missing(tenure,wage)
twoway kdensity grade if liberal || /*
*/ kdensity grade, /*
*/ legend(label(1 "only liberals") /*
*/ label(2 "general population"))
*-------------- 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 )
-----------------------------------------
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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