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RE: st: Select the last 4 numbers out of 8...


From   drreg@earthlink.net
To   statalist@hsphsun2.harvard.edu
Subject   RE: st: Select the last 4 numbers out of 8...
Date   Thu, 9 Jun 2011 13:43:02 -0400 (GMT-04:00)

Interesting phrase "...totally vague..." Need to think about that. Or maybe not.


reg jordan


-----Original Message-----
>From: Nick Cox <n.j.cox@durham.ac.uk>
>Sent: Jun 9, 2011 11:50 AM
>To: "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
>Subject: RE: st: Select the last 4 numbers out of 8...
>
>The question is ambiguous, meaning totally vague, about exactly what the form the data take, but whatever the details surely no special command is needed here!
>
>For example, if this information were in an integer variable 
>
>gen mmdd = mod(myvar, 10000) 
>
>and if it were in a string variable 
>
>gen mmdd = substr(myvar, -4,.) 
>
>would be answers to the first question, and the other answers are variations on that theme. Similar comments appear to data held as scalars or macros. 
>
>Nick 
>n.j.cox@durham.ac.uk 
>
>Jorge Eduardo Pérez Pérez
>
>Try the user written command -nsplit-
>
>ssc install nsplit
>
>On Thu, Jun 9, 2011 at 10:43 AM, Ivy Shiue <ivy.shiue@ki.se> wrote:
>
>> Does anyone know how to make a commend to only choose the last 4 numbers out of 8... for example, when we have birthdate of 8 numbers (yyyymmdd) and I only want the last 4 indicating the month and date (mmdd), how can I get it? Then do I use the same commend to extract the last 2 numbers (dd)? What if I only want the last 3rd and 4th number (mm)?
>
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