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Re: st: mutually exclusive options within a program


From   Marco Savegnago <savegnago.marco@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: mutually exclusive options within a program
Date   Wed, 19 Feb 2014 12:20:25 +0100

It worked!
Thank you very much!

Marco

2014-02-19 11:54 GMT+01:00 Nick Cox <njcoxstata@gmail.com>:
> 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
> njcoxstata@gmail.com
>
>
> On 19 February 2014 10:36, Marco Savegnago <savegnago.marco@gmail.com> 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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