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st: Re: tabstatmat repeatedly


From   Friedrich Huebler <huebler@rocketmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Re: tabstatmat repeatedly
Date   Fri, 24 Sep 2004 11:44:40 -0700 (PDT)

Camelia,

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
  }

Hope this helps,

Friedrich Huebler

--- Camelia Minoiu <cm2036@columbia.edu> wrote:
> 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?
> 
> Thank you in anticipation.
> 
> Camelia Minoiu
> PhD Student
> Department of Economics, Columbia University



		
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