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st: recovering "factor loadings" after mds


From   Dan Weitzenfeld <dan.weitzenfeld@emsense.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: recovering "factor loadings" after mds
Date   Wed, 28 Oct 2009 00:01:39 -0500

Hi,
I'm wondering if there's a way to determine how the (reduced) dimensions were calculated after running mds.  
I'm thinking of something analagous to factor loadings in PCA.  I understand that while PCA works on a correlation/covariance matrix of variables, MDS operates on a dissimilarity matrix of observations (right?) But I'm having trouble understanding why that should stop us from looking at the composition of the new, reduced dimensions the same way we look at the composition of the principal components.  
-pca- repeatedly offers the loadings, but I've read through the -mds- and mds postestimation help files and I can't find anything close.

Thanks,
Dan

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