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Re: st: regular expression or some simpler data extraction method


From   Matthew White <mwhite@poverty-action.org>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: regular expression or some simpler data extraction method
Date   Wed, 16 Nov 2011 14:56:14 -0500

Hi Ben,

How about:
gen vi_tnum = regexs(0) if regexm(phase, "[0-9]+ WT[ ,]?")

Best,
Matt

On Wed, Nov 16, 2011 at 2:34 PM, Ben Hoen <bhoen@lbl.gov> wrote:
> I have a number of possible string variations from which I am trying to
> extract a portion of, and am having trouble figuring out the correct regular
> expression, or, for that matter, if I can punt and use another (hopefully
> simpler) expression.
>
> The string variable is named "phase"
>
> 1 PV, 5 CC, 37 WT
> 101 WT
> 2 PV, 9 WT
> 1 WT
> 38 WT
>
> All I am concerned with is the number directly in front of "WT".  That
> number can be 1, 2 or 3 digits.
>
> The closest iteration was:
> gen vi_tnum=regexs(1) if regexm(phase, "[ 0-9A-Z]?[\,]?([0-9]+)[ A-Z]+$")
>
> but that produced a result that had its leading digit truncated for any
> number with more than one digit.
>
> Any thoughts, oh brilliant ones?
>
> Ben Hoen
> Principal Research Associate
> Lawrence Berkeley National Laboratory
> Office: 845-758-1896
> Cell: 718-812-7589
> bhoen@lbl.gov
> http://eetd.lbl.gov/ea/emp/staff/hoen.html
>
>
>
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>



-- 
Matthew White
Data Coordinator
Innovations for Poverty Action
101 Whitney Avenue, New Haven, CT 06510 USA
+1 434-305-9861
www.poverty-action.org

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