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st: about -cholesky()-

From   Huaandrew <>
To   <>
Subject   st: about -cholesky()-
Date   Tue, 22 May 2012 12:59:48 +0000

Hi everybody,
I tried to use -prvalue- to make some prediction but ended up with the following error message in Stata:
. prvalue, x(NYTCongyrstd -1.8190)

cholesky(): matrix has missing values


Would you please tell me what might be the possible reasons for that error?
I searched online but didn't find how Stata implements cholesky decomposition in -prvalue-.
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