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st: RE: chi-square-test in matrix or crosstab

From   "Martin Weiss" <>
To   <>
Subject   st: RE: chi-square-test in matrix or crosstab
Date   Fri, 18 Jun 2010 12:33:36 +0200


You can go back and forth between variables and matrices via

help mkmat

But the larger question remains: Why do you want to do this? Also note -h


-----Original Message-----
[] On Behalf Of Wetzel Martin
Sent: Freitag, 18. Juni 2010 11:35
Subject: st: chi-square-test in matrix or crosstab

Dear stata-users,

I'm looking for a opportunity to make chi-square-tests of already
acummulated data.
I have something like this

sysuse auto.dta, clear
tab2 rep78 foreign, matcell(A)

matrix list A

and now I want to test this matrix for statistical independence. If the
matrix would always have the same size, I could use William Gould's (2006)*
 mata-strategy, but it's looped over vars, so I could need a more flexible
Has anyone an idea?

Best regards,

* Gould (2006): Mata Matters: Interactive use. The Stata Journal 6 (3). pp.

Martin Wetzel 
Institut für Arbeitsmarkt- und Berufsforschung 
der Bundesagentur für Arbeit (IAB) 
Forschungsbereich E3 - Panel "Arbeitsmarkt und Soziale Sicherung" (PASS) 
Regensburger Straße 104 
90478 Nürnberg 
Tel.: 0911 179 8028 
Zimmer: eb-751 

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