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Re: st: Principal components


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Principal components
Date   Tue, 15 Apr 2008 10:51:12 +0100 (BST)

You can find them in the matrix e(L) after you have run -pca-.

Hope this helps,
Maarten

--- daniel cassar <danicassar@yahoo.com> wrote:

> Hi, 
> 
> I am at odds with principal components in Stata. I am using -pca- to
> create an index of eight variables but I cannot seem to find a way to
> find a way to get the weights for the underlying variables. Is there
> anybody who can help me with this? 
> 
> I use the following procedure
> 
> -pca var1 var2 var3 var4 var5 var6 var7 var8-
> 
> then, I get the first component as my index:
> 
> -predict index, score-
> 
> How do I get the weights for var1 ... var8 in index?
> 
> 
> Help very much appreciated. 
> 
> Best regards, 
> DC
> 
> 
> 
> 
> 
>      
>
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-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


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