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st: tetrachoric correlation

From   "prneiva" <>
Subject   st: tetrachoric correlation
Date   Wed, 15 Nov 2006 08:00:19 -0300

Thanks Austin, Maarten and Daniel. However, I am still having difficulties. 

When I write  matrix list r(Rho), the answer is matrix r(Rho) not found. 

When I use the following procedure:
matrix C = r(Rho)
local n = r(N)
factormat C, n(`n')

the answer is: matrix C has missing values. 

I donīt know what is happening, since the codebook shows that there is no missing values. 

Thank you 


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