[R] Grep command

[Jeff Newmiller]

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.
>
>x<-c("abc","def","rst","xyz","age","age2")
>x
>
>[1] "abc"  "def"  "rst"  "xyz"  "age"  "age2"
>
>grep("age2",x)
>
>[1] 6
>
>grep("age",x) # I need to grab "age" only, not "age2"
>
>[1] 5 6
>
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