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Re: st: Extracting substrings from variables.
From
[email protected] (Brendan Halpin)
To
[email protected]
Subject
Re: st: Extracting substrings from variables.
Date
Fri, 25 May 2012 19:17:29 +0100
On Fri, May 25 2012, Nick Cox wrote:
> . di regexm("Stata rules OK O1", "^637|642|O1")
> 1
OK, I was wrong that the grouping parentheses were unnecessary. However,
the way I used them first was also wrong.
Something like this is needed:
. gen pright = regexs(0) if regexm(mdiag1x, "^(637|642|O1)")
More evidence that Nick's reluctance about regexp is not unwise.
Brendan
--
Brendan Halpin, Department of Sociology, University of Limerick, Ireland
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