Hi Jonathan,
The function "isTRUE" is useful for this sort of thing:
isTRUE(pmatch("hi", "hop")) evaluates to FALSE.
--Gray
On Sat, Dec 19, 2009 at 12:47 PM, Jonathan <jonsle...@gmail.com> wrote:
> Hi,
> A noobie question: I'm simply trying to run a conditional statement that
> evaluates if a substring is found within a larger string. I find that if it
> IS found, my function returns TRUE (great!), but if not, the condition does
> not evaluate to FALSE.
>
> ex):
>
> if( grep("hi", "hop", fixed = TRUE) )
> print('yes, your substring is in your string')
> else print('no, your substring is not in your string')
>
> alternatively, I could replace grep with pmatch:
>
> if (pmatch('hi','hop'))
> print('yes, your substring is in your string')
> else print('no, your substring is not in your string')
>
>
> The first example, using grep, returns logical(0). The second, using
> pmatch, returns NA. Any idea how to convert either of those to FALSE, or
> else a different function that would do the trick?
>
> Thanks,
> Jon
>
> [[alternative HTML version deleted]]
>
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--
Gray Calhoun
Assistant Professor of Economics
Iowa State University
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