st: Re: simple method to identify string variables?

["Michael Blasnik" <michael.blasnik@verizon.net>]

...
The easiest way may be:

ds, has(type numeric)
local numvars "`r(varlist)'"
mean `numvars'

You can omit line 2 and just refer to `r(varlist)' in line 3, but I'm assuming 
you may want the list for other commands as well.

M Blasnik

----- Original Message ----- 
From: "David Radwin" <radwin@berkeley.edu>
To: <statalist@hsphsun2.harvard.edu>
Sent: Friday, September 07, 2007 2:38 PM
Subject: st: simple method to identify string variables?



> Dear Statalisters,
>
> Is there a simple way to identify string variables using an if statement? As 
> an obviously contrived example, suppose I wanted to use the -mean- command for 
> all numeric variables. I would get this error message:
>
> . sysuse auto,clear
> . mean _all
> varlist:  make:  string variable not allowed
> r(109);
>
> Can I limit the command to numeric variables only? I suspect there is an easy, 
> even obvious solution, but I can't find it anywhere.
>
> Thanks,
>
> David
> --
> David Radwin, Principal Analyst // radwin@berkeley.edu
> Office of Student Research, University of California, Berkeley
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