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Re: st: -syntax , option(varlist min=0)-?


From   Sergiy Radyakin <serjradyakin@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: -syntax , option(varlist min=0)-?
Date   Thu, 8 Oct 2009 14:43:07 -0400

Dear Jeph,

try:

capture syntax varlist, myoption(varname)
if !_rc {

  //program implementation for syntax1

  ....
  exit
}

syntax varlist, myoption
// program implementation for syntax2

this is often used when there are several distinct syntaxes possible
for a command.
See for example the implementation of -test- in test.ado.

Best regards, Sergiy Radyakin





On Thu, Oct 8, 2009 at 2:13 PM, Jeph Herrin <junk@spandrel.net> wrote:
>
> I would like a program to take an option which contains
> either a varlist or nothing. Something like
>
>  syntax varlist..., myoption(varlist min=0)
>
> which Stata doesn't like. The idea is that -myoption-
> only applies to the listed variables in the primary varlist;
> unless -myoption()- is specified, then it applies to all
> variables in the primary varlist. This sounds confusing
> even to me, so in pseudo code, I would like to have
>
>  myprogram var1-var10, myoption(var1)
>
> apply the option to only -var1-, but
>
>  myprogram var1-var10, myoption
>
> apply the option to var1-var10. Seems like I have done this
> before, but it escapes me now. Any ideas?
>
>
>
> thanks,
> Jeph
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