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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 13:07:57 +0100
On Fri, May 25 2012, Brendan Halpin wrote:
> On Fri, May 25 2012, Amal Khanolkar wrote:
>
>> gen preght = regexs(0) if regexm(mdiag1x, "[^637] | [^642] | [^O1]")
>
> A quick and untested suggestion:
>
> . gen preght = regexs(0) if regexm(mdiag1x, "^(637)|(642)|(O1)")
On testing, it seems the grouping parentheses are not necessary:
...................................................................
. input str10 mdiag1x
mdiag1x
1. "637 asdf"
2. "638 asdf"
3. "8637 asdf"
4. "642 asdf"
5. "O1 asdf"
6. end
. gen preght = regexs(0) if regexm(mdiag1x, "^637|642|O1")
(2 missing values generated)
. gen hasdiag = regexm(mdiag1x, "^637|642|O1")
. list
+------------------------------+
| mdiag1x preght hasdiag |
|------------------------------|
1. | 637 asdf 637 1 |
2. | 638 asdf 0 |
3. | 8637 asdf 0 |
4. | 642 asdf 642 1 |
5. | O1 asdf O1 1 |
+------------------------------+
...................................................................
Brendan
--
Brendan Halpin, Department of Sociology, University of Limerick, Ireland
Tel: w +353-61-213147 f +353-61-202569 h +353-61-338562; Room F1-009 x 3147
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