[Rcpp-devel] Using loess() from Rcpp

Romain Francois romain at r-enthusiasts.com
Fri Apr 2 10:11:32 CEST 2010

Le 02/04/10 08:35, Romain Francois a écrit :
> Hello Davor,
> Rcpp gives you the tools, but it is up to you to use them.
> Le 02/04/10 02:04, Davor Cubranic a écrit :
>> Has anyone here used R curve-fitting from Rcpp? Like loess(), for example? Reading the R code, after a couple of layers of preliminaries to extract all the required parameters, it ends up in C (loess_raw) and Fortran (lowesw and lowesp).
> Sooner or later, everything in R ends up in C or fortran.
>> It would be nice if there were already code out there that gives me a tidier interface that I could use instead of transcribing the R wrapper into C. And even cooler if R's 'formula' DSL had a C++ equivalent...
> An R formula is not much more than a language object, so you can
> manipulate it through the Rcpp::Language class. If you have ideas,
> design thoughts, on how to make it more convenient we will listen.

Not quite a DSL, but I've added the Rcpp::Formula class, which lets you 
create R formulae conveniently, e.g :

Formula f( "x ~ y + z" ) ;

see runit.Formula.R for more examples


Romain Francois
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