[R] Fast string comparison

Ralf B ralf.bierig at gmail.com
Tue Jul 13 06:52:57 CEST 2010


I am asking this question because String comparison in R seems to be
awfully slow (based on profiling results) and I wonder if perhaps '=='
alone is not the best one can do. I did not ask for anything
particular and I don't think I need to provide a self-contained source
example for the question. So, to re-phrase my question, are there more
(runtime) effective ways to find out if two strings (about 100-150
characters long) are equal?

Ralf






On Sun, Jul 11, 2010 at 2:37 PM, Sharpie <chuck at sharpsteen.net> wrote:
>
>
> Ralf B wrote:
>>
>> What is the fastest way to compare two strings in R?
>>
>> Ralf
>>
>
> Which way is not fast enough?
>
> In other words, are you asking this question because profiling showed one of
> R's string comparison operations is causing a massive bottleneck in your
> code? If so, which one and how are you using it?
>
> -Charlie
>
> -----
> Charlie Sharpsteen
> Undergraduate-- Environmental Resources Engineering
> Humboldt State University
> --
> View this message in context: http://r.789695.n4.nabble.com/Fast-string-comparison-tp2285156p2285409.html
> Sent from the R help mailing list archive at Nabble.com.
>
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