st: problem with -tabstatmat-

["Zurab Sajaia" <zsajaia@hotmail.com>]

I have encountered a problem with -tabstatmat- being unable to save the 
matrix when there are many rows. The source of problem was the line where 
names of all matrices were collected in local vectors

local vectors "`vectors' r(Stat`i') \"

and then the output matrix is generated:

matrix `matout' = `vectors' r(Stat`I')

The problem is solved if we accumulate matrix directly in the loop:

matrix `matout'=nullmat(`matout') \ r(Stat`i') . And we'll need to correct 
following few lines where the totals matrix is added.

Zurab

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