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st: Re: Scatterplot of mean values


From   Fernando Terrés <fernando.terres@upc.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: Re: Scatterplot of mean values
Date   Wed, 31 Mar 2010 13:55:08 +0200

Martin, perhaps I didn't explain it correctly
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.

Thanks again,
Fernando

--
Fernando Terres
Lecturer. PhD candidate
CERPIE/Research
Universitat Politecnica de Catalunya
Diagonal, 647 - 10
08028 Barcelona (Spain)
+34.934.010.708
fernando.terres@upc.edu
http://cerpie.upc.edu
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