Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

RE: st: RE: Factor Analysis and correlation table


From   "Verkuilen, Jay" <JVerkuilen@gc.cuny.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: RE: Factor Analysis and correlation table
Date   Mon, 28 Apr 2008 14:59:39 -0400

Nick Cox wrote:

>>I'd go a little further. There is no model underlying PCA. It's a
transformation procedure! 

Yes, I could see that. It certainly is a very useful pre-whitener or,
conversely, low-pass filter, for multivariate data. 

Lack of an error model is, IMO, a big issue. 


>>I've done some stupid things with it myself, so blame all round. <<

I think all of us who have done a reasonable amount of data analysis
have committed some major sins; the hope is that we've accomplished
enough virtue to manage forgiveness. We shall all have to pray to the
spirit of Saint Ronald of Rothampstead for intersession. :) 

Jay

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index