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st: RE: by-graph


From   "Steichen, Thomas" <STEICHT@rjrt.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: by-graph
Date   Fri, 28 Feb 2003 15:33:42 -0500

Itsik Dvir writes:

> I want to make the two changes in the following by-graph command
> 
> twoway (scatter y x ) (lfit y x ) , by(group, total  )
> 
> suppose group contains three subsets of the data.
> 1. eliminate the fitted line in just one individual graph, 
> while still displaying the scatter x-y data.
> 2. change the default title of the total graph ("Total") to say "All" ..
> 
> Can anyone give an advice?

You would need to manually create the parts. The following assumes
groups have numerical values 1, 2 and 3 and group 3 does not need
the fitted line (but is not tested!):

 twoway (scatter y x, if group==1) (lfit y x, if group==1) ///
        (scatter y x, if group==2) (lfit y x, if group==2) ///
        (scatter y x, if group==3)                         ///
        (scatter y x)              (lfit y x)              ///
  legend(label(1 "Group 1 data")   label(2 "Group 1 fit")  ///
         label(3 "Group 2 data")   label(4 "Group 2 fit")  ///
         label(5 "Group 3 data")                           ///
         label(6 "All data")       label(7 "All fit") )

You likely would want to name these better and would have to 
play around with symbol and line colors.  

Tom

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