[R] splitting by the last occurance of a dot

[Gabor Grothendieck]

On Tue, Nov 8, 2011 at 6:48 AM, Ashim Kapoor <ashimkapoor at gmail.com> wrote:
>
>> Assuming we want to split off the number at the end try this which
>> splits on those dots which are followed by a digit:
>>
>> strsplit(r, "\\.(?=\\d)", perl = TRUE)
>>
>
> Dear Gabor,
>
> Thank you  very much. That works very well. I don't completely understand it
> though. A few words on what the (?=\\d) is doing would be nice.
>

See the info on zero width lookahead assertions on the ?regex page.


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