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RE: st: loop over tests


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   statalist@hsphsun2.harvard.edu
Subject   RE: st: loop over tests
Date   Fri, 7 May 2010 16:31:44 +0200

<>
Quite apart from the construction of the loop, you may want to capture the results with a -postfile-. Scanning them manually would be difficult and error-prone.

HTH
Martin

-original message-
Subject: st: loop over tests
From: Nikolaos Kanellopoulos <nkkanel@yahoo.gr>
Date: 07-05-2010 16:21

Dear all,

I want to run the following tests after a regression command:
sysuse auto , clear
ta rep78, gen(t)
reg price  mpg t1 t2 t3 t4

/*First set of tests: Test each variable with the rest*/
test t1 = t2
test t1 = t3
test t1 = t4
test t2 = t3
test t2 = t4
test t3 = t4

/*Second set of tests: Test all possible combinations*/
test t1 = t2
test t1 = t2 = t3
test t1 = t2 = t3 = t4
test t2 = t3
test t2 = t3 = t4
test t3 = t4

For the first set I do something like:
forv i=1/4{
    local min = `i' + 1
    forv l = `min'/4 {
        test t`i' = t`l'
}
}

Is there a way to do a loop for the second set as well and is there a more efficient way for my loop. 
In my actual dataset the number of variables I need to test are almost 100.


Thanks in advance

Nikos



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