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Re: st: RE: continuing a loop from after it encounters an error


From   Nick Mosely <mosely@uw.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: continuing a loop from after it encounters an error
Date   Thu, 3 Feb 2011 11:46:12 -0800

Ahah. -capture noisily- works swell. Thanks!

On Thu, Feb 3, 2011 at 10:52 AM, Nick Cox <n.j.cox@durham.ac.uk> wrote:
> Depending on what the "objects" are, there may be a better solution to your problem that allows you to avoid it altogether, but in terms of your question, -capture- is what you seek.
>
> -capture- eats errors.
>
> Look also at -capture noisily- and -noisily capture-. Here's the difference:
>
> . sysuse auto
> (1978 Automobile Data)
>
> . di frog[1]
> frog not found
> r(111);
>
> . capture noisily di frog[1]
> frog not found
>
> . noisily capture di frog[1]
>
> . noisily capture di mpg[1]
>
> . capture di mpg[1]
>
> . capture noisily di mpg[1]
> 22
>
> Nick
> n.j.cox@durham.ac.uk
>
> Nick Mosely
>
> I've built a loop that encounters an error periodically due to the
> fact that stata can't find one of the objects specified in the list. I
> don't mind the error, but I would like stata to skip objects in list
> that encounter the error and continue to the next iteration of the
> loop, rather than breaking the loop. I've tried the continue command,
> but am not sure that is what it's meant for.
>
> Here is a simplified version of the code. In this example, assume that
> objects1 and object3 are valid commands but object2 is not:
>
> foreach i in object1 object2 object3 {
> display `i'
> continue
> }
>>object1
>>unrecognized command:  object2
>>r(199);
>
> What can I do get the code to continue running through object3?
>
>
> *
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>

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