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Re: st: Re: Scatterplot of mean values

From   Maarten buis <>
Subject   Re: st: Re: Scatterplot of mean values
Date   Wed, 31 Mar 2010 12:21:25 +0000 (GMT)

--- On Wed, 31/3/10, Fernando Terrés wrote:
> Let us say that, in the auto.dta dataset, I want to plot
> the mean values of mileage against the mean values of
> weight, both means grouped by repair record.
> I could do:
> *************
> sysuse auto, clear
> collapse mpg weight, by(rep78)
> twoway (scatter mpg weight)
> *************
> My problem is that I need to do the same task for several
> categorical variables of a large file, and every collapse
> forces me to upload the dataset again.

*---------------------- begin example ---------------
sysuse auto, clear
foreach var of varlist rep78 foreign {
    collapse mpg weight, by(`var')
    twoway scatter mpg weight if `var' < .,    /// 
           mlabel(`var') mlabpos(0) msymbol(i) ///
           name(`var', replace)
*----------------- end example -----------------------

Hope this helps,

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


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