Thanks for this! Axel.
On Thu, Dec 1, 2011 at 11:29 AM, Liaw, Andy <andy_l...@merck.com> wrote: > The first version of the package was created by re-writing the main > program in the original Fortran as C, and calls other Fortran subroutines > that were mostly untouched, so dynamic memory allocation can be done. > Later versions have most of the Fortran code translated/re-written in C. > Currently the only Fortran part is the node splitting in classification > trees. > > Andy > > > -----Original Message----- > > From: r-help-boun...@r-project.org > > [mailto:r-help-boun...@r-project.org] On Behalf Of Peter Langfelder > > Sent: Thursday, December 01, 2011 12:33 AM > > To: Axel Urbiz > > Cc: R-help@r-project.org > > Subject: Re: [R] Random Forests in R > > > > On Wed, Nov 30, 2011 at 7:48 PM, Axel Urbiz > > <axel.ur...@gmail.com> wrote: > > > I understand the original implementation of Random Forest > > was done in > > > Fortran code. In the source files of the R implementation > > there is a note > > > "C wrapper for random forests: get input from R and drive > the Fortran > > > routines.". I'm far from an expert on this...does that mean that the > > > implementation in R is through calls to C functions only > > (not Fortran)? > > > > > > So, would knowing C be enough to understand this code, or > > Fortran is also > > > necessary? > > > > I haven't seen the C and Fortran code for Random Forest but I > > understand the note to say that R code calls some C functions that > > pre-process (possibly re-format etc) the data, then call the actual > > Random Forest method that's written in Fortran, then possibly > > post-process the output and return it to R. It would imply that to > > understand the actual Random Forest code, you will have to read the > > Fortran source code. > > > > Best, > > > > Peter > > > > ______________________________________________ > > R-help@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide > > http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html> > > and provide commented, minimal, self-contained, reproducible code. > > > Notice: This e-mail message, together with any attach...{{dropped:16}} ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
