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st: Re: Split-half; was: OT:your favorite math equations editor


From   Ulrich Kohler <kohler@wz-berlin.de>
To   statalist@hsphsun2.harvard.edu
Subject   st: Re: Split-half; was: OT:your favorite math equations editor
Date   Fri, 17 Sep 2004 12:22:42 +0200

Simon Moore wrote:
> I am hoping to use non-linear least squares (nl) in Stata v8.0. The
> analyses are relatively straight forward (nl exp2 var1 var2). However
> it would be nice if I could perform some form of split half analysis
> (i.e. fit the model to one half of the dataset and then see how it
> predicts on the other half). Is there a means of achieving this in
> Stata?


Basically something like:

. gen r = uniform()
. nl ... if r < .5
. predict Yhat if r >= .5

uli

-- 
kohler@wz-berlin.de
+49 (030) 25491-361


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