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Re: st: mutually exclusive options within a program


From   Nick Cox <[email protected]>
To   "[email protected]" <[email protected]>
Subject   Re: st: mutually exclusive options within a program
Date   Wed, 19 Feb 2014 10:54:03 +0000

This can be answered quickly.

Make your options take string arguments, but don't tell the user that.
So, your first level of checking is whether both options were
specified:

if "`alpha'" != "" & "`beta'" != "" {
       <terminate>
}

Your second level of checking is for appropriate numeric input.

Nick
[email protected]


On 19 February 2014 10:36, Marco Savegnago <[email protected]> wrote:
> Dear statalist,
>
> I'm writing a program which has to accept only one of two possible
> options (say either alpha or beta in the code below, each one with a
> default value):
>
>
>      syntax [, alpha(integer 5) beta(integer 10)]
>
>
>
> I need Stata to return an error code whenever these two options are
> invoked together.
>
> How can I achieve this?
>
> Thanks for your consideration,
>
> Marco Savegnago
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