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st: using "by" for scores in factor or PC analysis


From   Amita Rantidev Chudgar <amitac@stanford.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: using "by" for scores in factor or PC analysis
Date   Sat, 5 Feb 2005 11:22:18 -0800 (PST)

Stata allows PCA or factor analysis with "by" option

so I can do

sort region
by region : pca var1 var2 var3

but it does not allow "score" with by!

I want to use the first component as a regional index and not being able
to generate the score defeats the purpose of generating pca "by
region"!

Any help will be appreciated,

Thanks,

Amita Chudgar
Stanford School of Education


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