st: how can I make a string matrix?

[Edgard Alfonso Polanco Aguilar <e-polanc@uniandes.edu.co>]

Dear Statalisters,

I'm working is Stata9 SE and I need to create a string matrix. Stata's 
matrix commands don't allow me to make such a thing and I've tried 
defining it on Mata and then call it from Stata but I haven't found a 
way to do it. Does anybody knows a command or a way to make such a thing?

Thank you very much,

Edgard
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