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st: matrix problem


From   Richard Goldstein <richgold@ix.netcom.com>
To   statalist <statalist@hsphsun2.harvard.edu>
Subject   st: matrix problem
Date   Wed, 15 May 2013 11:04:34 -0400

Hi all,

I am using Newson's -somersd- command (from ssc); results, including the
piece I want, are saved in a matrix and I can list that matrix:

. mat list r(table)

r(table)[9,1]
            yhat1
     b  .62563699
    se  .00834334
     t  74.986391
pvalue  3.73e-257
    ll  .60924043
    ul  .64203354
    df        452
  crit  1.9652262
 eform          0

My problem comes in attempting to use the [1,1] term (.62563699 here);
for example, I can't seem to list it:

. matrix li r(table)[1,1]
[ invalid name
matrix [1,1] not found
r(111)

and I can't do what I want to do - add this value to a scalar:

scalar cstat=cstat+r(table)[1,1]
invalid syntax
r(198)

note that cstat is not the problem as it is defined (as 0) prior to
entering my loop

clearly I am doing something wrong but I have been unable to figure out
what it is or how to fix it

Rich
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