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st: Re: Extract information from a string variable


From   "Sherriff, Martyn" <martyn.sherriff@kcl.ac.uk>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: Re: Extract information from a string variable
Date   Tue, 3 Mar 2009 12:58:11 +0000

I have data set which should have a string identifier of the form LLLNNLLL such as INR80TMA from which I can extract the first 3 letters, 2 numbers and last 3 letters as sub-identifiers. Unfortunately some of the data has been miscoded such as IR1NT.

How can I extract the letter, number, letter code from this, or is it a case of editing all the codes to the correct format. I am using Stata 10.

Many thanks,
Martyn

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