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Re: st: legend for reference lines


From   Maarten buis <[email protected]>
To   [email protected]
Subject   Re: st: legend for reference lines
Date   Sat, 19 Dec 2009 09:11:54 +0000 (GMT)

--- On Sat, 19/12/09, Robert Duval wrote:
> I have a graph with several vertical reference lines (i.e.
> xline(#1 #2 etc)) each with different line pattern styles. 
> Is there a way to create a legend to indicate what each
> reference line means ?

Here is one possible solution. -scatteri- and everything 
following is there to create a second x-axis at the top of 
the graph, which contains labels for the different 
reference lines. I think this way it is easier for the 
reader to decode which label belongs to which reference 
line. 

*------------- begin example ----------------
sysuse auto, clear
twoway kdensity mpg ,                     ///
       xline(16.1,lp(solid))              /// 
       xline(22.22,lp(dash))              /// 
       xline(28.33,lp(shortdash)) ||      ///
       scatteri 0 20, msymbol(i) xaxis(2) ///
       xtitle("",axis(2))                 ///
       xscale(range(10 41) axis(2))       ///
       legend(off)                        ///
       xlab(16.1 "foo" 22.22 "bar"        ///
            28.33 "blup", axis(2))
*--------------- 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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