Wrap a print or cat function around it.
Sent from my iPhone
On Sep 13, 2013, at 6:29 PM, capricy gao <capri...@yahoo.com> wrote:
>
>
> I am just testing the possibility of using grep under for loop:
>
>> for(i in 1:10){grep("a",letters)}
>
>
> nothing came out;
>
> when I ran:
>
>
>> grep("a",letters),
>
>
> I got "1"
>
> so in my for loop, I expected to see ten "1"s, but I did not.
>
> Could anybody help me to figure out why? Thanks a lot for your help.
>
> Capricy
> [[alternative HTML version deleted]]
>
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