[R] Grep command

Jeff Newmiller jdnewmil at dcn.davis.ca.us
Wed May 4 08:16:48 CEST 2016

Yes, but the answer is likely to depend on the actual patterns of strings in your real data, so the sooner you go find a book or tutorial on regular expressions the better.  This is decidedly not R specific and there are already lots of resources out there.

Given the example you provide,  the pattern "age$" should work. However, that is probably not sufficiently selective for a practical data set so start learning to fish (design regex patterns) yourself. 
Sent from my phone. Please excuse my brevity.

On May 3, 2016 10:45:42 PM PDT, Steven Yen <syen04 at gmail.com> wrote:
>Dear all
>In the grep command below, is there a way to identify only "age" and
>not "age2"? In other words, I like to greb "age" and "age2"
>separately, one at a time. Thanks.
>[1] "abc"  "def"  "rst"  "xyz"  "age"  "age2"
>[1] 6
>grep("age",x) # I need to grab "age" only, not "age2"
>[1] 5 6
>R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>PLEASE do read the posting guide
>and provide commented, minimal, self-contained, reproducible code.

	[[alternative HTML version deleted]]

More information about the R-help mailing list