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st: RE: Re: tabstatmat repeatedly


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Re: tabstatmat repeatedly
Date   Sun, 26 Sep 2004 16:01:27 +0100

This code can be condensed as follows: 

sysuse auto, clear
foreach var of varlist price mpg weight {
	quietly tabstat `var', stat(mean sd) by(foreign) save
	tabstatmat mat
	matrix bigmat = nullmat(bigmat) \ mat 
}

Nick 
n.j.cox@durham.ac.uk 

Friedrich Huebler
 
> Here is one way to build up a big matrix with the results from
> -tabstat-.
> 
> sysuse auto, clear
> local i = 1
> foreach var of varlist price mpg weight {
>   quietly tabstat `var', stat(mean sd) by(foreign) save
>   tabstatmat mat
>   if `i'==1 {
>     matrix bigmat = mat
>     }
>     else {
>       matrix bigmat = bigmat \ mat
>     }
>   local i = `i' + 1
>   }
 
Camelia Minoiu 

> > I would like to obtain summary statistics (by another variable) for
> > a list
> > of 100 variables, and then save all of these in one big matrix, and
> > preferably have this exported into a text file.
> > I have been following the discussion surrounding -tabstatmat-as
> > well as that
> > regarding the command - mat2txt-  (Feb 2004)  but running mat2txt
> > on my
> > computer gives me the error message: "version 8.2 not supported" (I
> > use
> > Stata 8) and with tabstatmat I don't know if I can do this
> > repeatedly. For
> > example, writing a tiny program such as the one below does not seem
> > to work:
> > 
> > foreach X of varist v1-v100 {
> >     quietly tabstat `X', statistics(mean, sd) by(category_`X') save
> >     tabstatmat mat`X'
> >     svmat mat`X'
> >     keep mat`X'*
> >     dropmiss, obs
> >     outsheet using c:\data\matrix.txt
> > }
> > 
> > Do you happen to know what I can do so that all the results from
> > each
> > tabstat on each variable are appended together in one big matrix?

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