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st: Re: tetrachoric correlation


From   "Rodrigo A. Alfaro" <ralfaro76@hotmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: tetrachoric correlation
Date   Wed, 15 Nov 2006 09:14:02 -0500

Pedro,

Did you try?

tetrachoric varlist
matrix list r(Rho)

(where varlist is the list of variable that you want)

and you got

matrix r(Rho) not found
r(111);

If that, you have to get an error somewhere...
update your Stata and type -return list- AFTER
-tetrachoric- command. You should see a list of
available matrices.

Rodrigo.




----- Original Message ----- 
From: "prneiva" <prneiva@terra.com.br>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, November 15, 2006 6:00 AM
Subject: st: tetrachoric correlation


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

Pedro




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