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Re: st: Does -strpos()- return the second occurrence of a string?


From   Nick Cox <njcoxstata@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Does -strpos()- return the second occurrence of a string?
Date   Sat, 20 Apr 2013 16:11:21 +0100

Replace the first temporarily by a mask of the same length.

. di strpos("frogtoadfrog", "frog")
1

. di strpos(subinstr("frogtoadfrog", "frog", "grog", 1), "frog")
9

This works for variables too.

See also -moss- (SSC) and

http://www.stata-journal.com/article.html?article=dm0056


Nick
njcoxstata@gmail.com


On 20 April 2013 15:54, Pedro Nakashima <nakashimapedrolist@gmail.com> wrote:
> Dear users
>
> I'm looking for a way to identify the position of a string, which is
> not the first.
>
> For example, when we use-strpos () - to find the underscore "_" in the word:
>
> ab_cd_ef
>
> The function strpos () will return 3. But I wanted to return the
> position of the second occurrence, 6.
>
> Does anyone know a way to deal with this problem?
>
> Best regards,
> Peter
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