[Rcpp-devel] Rcpp "version" of R's match function

[Willem Ligtenberg]

and now to the list...

Nothing specific, but some way of sharing would be nice. :)


On Thu, Nov 15, 2012 at 3:58 PM, Romain Francois
<romain at r-enthusiasts.com>wrote:

> Help is very welcome. Why github though ?
>
> Le 15/11/12 15:42, Willem Ligtenberg a écrit :
>
>> Would be nice to keep the list and the progress on github.
>> Other might pitch in and help out, I am also interested, just don't know
>> how much time I can spend on it.
>>
>> Kind regards,
>>
>> Willem
>>
>>
>> On Thu, Nov 15, 2012 at 3:24 PM, Romain Francois
>> <romain at r-enthusiasts.com <mailto:romain at r-enthusiasts.**com<romain at r-enthusiasts.com>>>
>> wrote:
>>
>>     Le 15/11/12 14:52, Hadley Wickham a écrit :
>>
>>             R
>>             utilisateur     système      écoulé
>>                     0.338       0.024       0.362
>>             R (second time)
>>             utilisateur     système      écoulé
>>                     0.262       0.000       0.262
>>             match_ manual Rcpp
>>             utilisateur     système      écoulé
>>                     0.144       0.000       0.144
>>             match__ internal Rcpp
>>             utilisateur     système      écoulé
>>                     0.134       0.000       0.133
>>
>>
>>         Nice!
>>
>>             Worth noting that the R version gets better the second time.
>>             I guess R keeps
>>             its hash table somewhere.
>>
>>
>>         Hmmm - see
>>         http://cran.r-project.org/web/**__packages/fastmatch/index.**html<http://cran.r-project.org/web/__packages/fastmatch/index.html>
>>
>>         <http://cran.r-project.org/**web/packages/fastmatch/index.**html<http://cran.r-project.org/web/packages/fastmatch/index.html>
>> >
>>
>>
>>     Ouch. Simon wins:
>>
>>                        expr      min        lq    median        uq
>>  max
>>     1  fmatch(xx, letters)  59.4727  60.29989  74.18049  77.94288 112.2938
>>     2 match__(xx, letters) 137.3878 137.77486 138.33766 152.14018 193.3748
>>     3  match_(xx, letters) 147.7115 148.36442 149.20221 162.82343 171.3181
>>     4   match(xx, letters) 288.4345 293.10380 294.58833 296.26125 333.1210
>>
>>
>>         Hadley
>>
>>         PS.  Would you be interested in a set of R functions that from a
>>         quick
>>         skim of the R sources that I think could be much much faster if
>>         implemented in Rcpp?
>>
>>
>>     Sure. Time I have available will decide what I do of the list ^^.
>>
>>
>>     --
>>     Romain Francois
>>     Professional R Enthusiast
>>     +33(0) 6 28 91 30 30 <tel:%2B33%280%29%206%2028%**2091%2030%2030>
>>
>>     R Graph Gallery: http://gallery.r-enthusiasts._**_com
>>
>>     <http://gallery.r-enthusiasts.**com<http://gallery.r-enthusiasts.com>
>> >
>>     `- http://bit.ly/SweN1Z : SuperStorm Sandy
>>
>>     blog: http://romainfrancois.blog.__f**ree.fr <http://free.fr>
>>
>>     <http://romainfrancois.blog.**free.fr<http://romainfrancois.blog.free.fr>
>> >
>>     |- http://bit.ly/RE6sYH : OOP with Rcpp modules
>>     `- http://bit.ly/Thw7IK : Rcpp modules more flexible
>>
>>     ______________________________**___________________
>>     Rcpp-devel mailing list
>>     Rcpp-devel at lists.r-forge.r-__**project.org<Rcpp-devel at lists.r-forge.r-__project.org>
>>     <mailto:Rcpp-devel at lists.r-**forge.r-project.org<Rcpp-devel at lists.r-forge.r-project.org>
>> >
>>     https://lists.r-forge.r-__**project.org/cgi-bin/mailman/__**
>> listinfo/rcpp-devel<https://lists.r-forge.r-__project.org/cgi-bin/mailman/__listinfo/rcpp-devel>
>>     <https://lists.r-forge.r-**project.org/cgi-bin/mailman/**
>> listinfo/rcpp-devel<https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel>
>> >
>>
>>
>>
>>
>>
>> ______________________________**_________________
>> Rcpp-devel mailing list
>> Rcpp-devel at lists.r-forge.r-**project.org<Rcpp-devel at lists.r-forge.r-project.org>
>> https://lists.r-forge.r-**project.org/cgi-bin/mailman/**
>> listinfo/rcpp-devel<https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel>
>>
>>
>
> --
> Romain Francois
> Professional R Enthusiast
> +33(0) 6 28 91 30 30
>
> R Graph Gallery: http://gallery.r-enthusiasts.**com<http://gallery.r-enthusiasts.com>
> `- http://bit.ly/SweN1Z : SuperStorm Sandy
>
> blog:            http://romainfrancois.blog.**free.fr<http://romainfrancois.blog.free.fr>
> |- http://bit.ly/RE6sYH : OOP with Rcpp modules
> `- http://bit.ly/Thw7IK : Rcpp modules more flexible
>
> ______________________________**_________________
> Rcpp-devel mailing list
> Rcpp-devel at lists.r-forge.r-**project.org<Rcpp-devel at lists.r-forge.r-project.org>
> https://lists.r-forge.r-**project.org/cgi-bin/mailman/**
> listinfo/rcpp-devel<https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.r-forge.r-project.org/pipermail/rcpp-devel/attachments/20121115/04e1aa20/attachment-0001.html>