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st: RE: AW: RE: Re: Question about -tabi- and its calculations


From   "Nick Cox" <[email protected]>
To   <[email protected]>
Subject   st: RE: AW: RE: Re: Question about -tabi- and its calculations
Date   Tue, 24 Mar 2009 16:50:34 -0000

I don't agree. 

-profiler- does what it says. 

The effect of your recommendation would be to add this kind of message to every set of -profiler- outputs, as absolutely no Stata program (strict sense) can act independently of the executable. 

That might be a useful reminder for a first-time user, but it should rapidly become tedious and pointless on repetition. 

At most, what it does not do w.r.t. the executable might be made a little clearer in the documentation (if it's unclear; I've not read the manual entry). 

Nick 
[email protected] 

Martin Weiss

True, I overlooked this issue. -profiler- could profit from a note at the
bottom of its output to the effect of "Dear user, Stata also dipped its toes
into the executable, so you may want to be careful to read too much into my
results"...

Nick Cox

This is correct, but does not much illuminate Tiago's question. 

-tabi- is just a wrapper for -tabulate- and all the work that concerns Tiago
is done off-stage by -tabulate-, which is part of the executable. Thus there
is no code that users can look at. Precisely what -tabulate- does is thus a
matter for the manual entry. 

. viewsource tabi.ado 

is a more direct way to see this. 

Nick 
[email protected] 

Martin Weiss

If your screen is cluttered too heavily by -trace-, try

******
cap profiler clear
profiler on
tabi 30 13 \ 18 7 \ 38 22, all exact
profiler off
profiler report
******

which shows that no other -program- apart from -tabi- is involved.

Tiago V. Pereira

> I am trying to trace -tabi- to see how the asymptotic standard errors for
> several statistics are calculated (Goodman-Kruskal´s gamma, tau-b,
> Cramer´s V, etc..)
>
> However, I could not figure out exactly which program performs the
> calculations.Again, any advice is more than welcome.


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