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From |
Phil Schumm <pschumm@uchicago.edu> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: problem with regexm leading to "regexp: unterminated ()" error for all observations |

Date |
Fri, 3 Jun 2011 12:10:53 -0500 |

On Jun 3, 2011, at 7:35 AM, Jamie Fagg wrote:

I've a problem with the function -regexm-. I get the followingmessage:regexp: unterminated ()

<snip>

#delimit ;//regular expression to define whether postcode is syntacticallycorrectge postcodevalid = 1 if regexm(postcode,"(GIR 0AA)|(((A[BL]|B[ABDHLNRSTX]?|C[ABFHMORTVW]|D[ADEGHLNTY]|E[HNX]?|F[KY]|G[LUY]?|H[ADGPRSUX] |I[GMPV]|JE|K[ATWY]|L[ADELNSU]?|M[EKL]?|N[EGNPRW]?|O[LX]|P[AEHLOR] |R[GHM]|S[AEGKLMNOPRSTY]?|T[ADFNQRSW]|UB|W[ADFNRSV]|YO|ZE)[1-9]?[0-9] |((E|N|NW|SE|SW|W)1|EC[1-4]|WC[12])[A-HJKMNPR-Y]|(SW|W)([2-9]|[1-9] [0-9])|EC[1-9][0-9]) [0-9][ABD-HJLNP-UW-Z]{2})")==1;

[ABD-HJLNP-UW-Z]{2} with the equivalent [ABD-HJLNP-UW-Z][ABD-HJLNP-UW-Z]

(p1)|(((p2a1a|p2a1b|p2a1c)p2a1d|p2a2|p2a3|p2a4)p2b) where the individual parts (as assigned to Stata macros) are loc p1 "GIR 0AA"

loc p2a1d "[1-9]?[0-9]" loc p2a2 "((E|N|NW|SE|SW|W)1|EC[1-4]|WC[12])[A-HJKMNPR-Y]" loc p2a3 "(SW|W)([2-9]|[1-9][0-9])" loc p2a4 "EC[1-9][0-9]" loc p2b " [0-9][ABD-HJLNP-UW-Z][ABD-HJLNP-UW-Z]" This may then be easily broken up as follows: gen byte valid = regexm(postcode,"`p1'") replace valid = 1 if regexm(postcode,"`p2a1a'`p2a1d'`p2b'") replace valid = 1 if regexm(postcode,"`p2a1b'`p2a1d'`p2b'") replace valid = 1 if regexm(postcode,"`p2a1c'`p2a1d'`p2b'") replace valid = 1 if regexm(postcode,"(`p2a2'|`p2a3'|`p2a4')`p2b'") -- Phil * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: problem with regexm leading to "regexp: unterminated ()" error for all observations***From:*Jamie Fagg <j.fagg@ich.ucl.ac.uk>

**References**:**st: problem with regexm leading to "regexp: unterminated ()" error for all observations***From:*Jamie Fagg <j.fagg@ich.ucl.ac.uk>

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