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Re: st: matrix operation not found

From   Brendan Halpin <>
Subject   Re: st: matrix operation not found
Date   Tue, 09 Oct 2007 22:04:11 +0100

"Gao Liu" <> writes:

> where `column' and `column'_`svc_year'_`svc_month' are matrix and have
> been given a value earlier.  But when running, an error message pops
> up, indicating that " matrix operation not found, r(501); ". Can
> anybody tell me what is the wrong with the code ?

At a guess, one of your local macros is empty, probably `column' so
Stata is seeing 

  "mat =(" 

instead of 

  "mat age=("

 or similar. 

Brendan Halpin,  Department of Sociology,  University of Limerick,  Ireland
Tel: w +353-61-213147 f +353-61-202569 h +353-61-338562; Room F2-025 x 3147
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