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st: only keep obs of determinate string length

From   Steve Nakoneshny <>
To   "" <>
Subject   st: only keep obs of determinate string length
Date   Wed, 30 Jan 2013 10:47:43 -0700

Hello all,

I'm drawing a blank on what should be a ridiculously easy problem.

I have a unique string id var. Values in this var vary from 8-16 characters in length. I only want to keep obs where the length of the id string is either 11 or 12 characters long. I know I can solve this in a more cumbersome manner using the -regex- machinery, but I was hoping for a more succinct solution using string functions. Unfortunately, I'm having a mental block with choosing the appropriate function. Suggestions would be appreciated.


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