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st: RE: RE: sequential graphing


From   "Lim, Raymond" <rl2240@columbia.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: sequential graphing
Date   Tue, 15 Feb 2011 13:48:47 -0500

I guess a more concrete example of pcspike would clarify. This is a completely random example. Let's say you have a map of Central Park. You have beginning x-y coordinate of a trip and end x-y. You connect these points with a red line for trips that are completed earlier than expected or on time, and a blue line for trips that are completed later than expected. In my graphing command, if I specify the red first and blue next; the blue lines washes out the red. Vice versa if I swap the order. 

The code would be something along the lines of:
twoway pcspike y_start x_start y_end x_end if early==1, lwidth(vvthin) lcolor(red)  ///
|| pcspike y_start x_start y_end x_end if early==0, lwidth(vvthin) lcolor(blue) 

Again, this is a completely random example. 

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