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st: Adding R-Squared to sw command output


From   Rena Jenkins <r_jenkins@postmaster.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   st: Adding R-Squared to sw command output
Date   Thu, 27 May 2004 15:53:32 +0100

Is there a Stata programming guru out there who could help me modify the sw command so that the R-squared of the model is output at each stage? (I am just running a linear regression.)  i.e. to print the value of e(r2) at each stage.

So that when you run something like
sw regress y x1 x2 x3, pe(0.05)

Instead of
                      begin with empty model
p = 0.0032 <  0.0500  adding   x2
p = 0.0153 <  0.0500  adding   x1
p = 0.0424 <  0.0500  adding   x3

You get something like:
                      begin with empty model
p = 0.0032 <  0.0500  adding   x2, R-squared = 0.2018
p = 0.0153 <  0.0500  adding   x1, R-squared = 0.2523
p = 0.0424 <  0.0500  adding   x3, R-squared = 0.2852

I have had a go at making a copy of sw.ado (swr.ado, say) and
trying just to run the copy with minimal alterations. I couldn't
even do that, so I need some help here.

I'm hoping that this would be easy to do for someone more
knowledgeable than I am.

Thanks in advance and kind regards

Rena


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