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st: polychoric for huge data sets


From   Timea Partos <Timea.Partos@cancervic.org.au>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: polychoric for huge data sets
Date   Wed, 5 Sep 2012 02:37:56 +0000

Hello all,

I need to run a factor analysis on ordinal data.  My dataset is huge (7000+ cases with 40+ variables) so I can't run the polychoric.do program written by Stas Kolenikov, because it just can't handle it.  

Does anyone know of a fast way to obtain the polychoric correlation matrix for very large data sets?

Alternatively, I was thinking of running the factor analysis using the Spearman rho (rank-order correlations) matrix instead.  Would this be appropriate?

Thanks in advance,
-Timea



Ms. Timea Partos
Research Officer
T: +61 (0)3 96355183
F: +61 (0)3 96355440
E: Timea.Partos@cancervic.org.au
Cancer Council Victoria
Vichealth Centre for Tobacco Control
100 Drummond street, Carlton Vic 3053 Australia
www.cancervic.org.au 


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