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 <sye...@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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