[R] Proper use of grep

Doran, Harold HDoran at air.org
Thu Jul 15 23:41:06 CEST 2010

Excellent idea

-----Original Message-----
From: Erik Iverson [mailto:eriki at ccbr.umn.edu] 
Sent: Thursday, July 15, 2010 5:40 PM
To: Doran, Harold
Cc: r-help at r-project.org
Subject: Re: [R] Proper use of grep

Doran, Harold wrote:
> Thanks. Yes, I did that on a toy data set and with my real data. It
> *seems* to have worked. I just work with grep so rarely that I didn't
> want to miss something.

Yes, I see no reason why it won't work.  You can do another check 
'manually'. You know how many of each you expect by


So you can add up the ones that you care about, and then make sure that 
your resulting subset using grep has that many rows...

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