Look for do_modelmatrix here: https://svn.r-project.org/R/trunk/src/main/model.c
On Sat, Jan 17, 2009 at 5:40 PM, Murray Cooper <myrm...@earthlink.net> wrote: > Dear Dr Murdoch, > > I understand in principle your explanation, but specifically where in the > source distribution are these functions found? For instance, I would like > to look at the code for model.matrix. Ex: > ans <- .Internal(model.matrix(t, data)) > > I have looked at the source distribution but been unable to locate the > file which contains model.matrix. > > Thanks for your help. > > Murray Cooper > > ----- Original Message ----- From: "Duncan Murdoch" <murd...@stats.uwo.ca> > To: "zhijie zhang" <rusers...@gmail.com> > Cc: <r-h...@stat.math.ethz.ch> > Sent: Saturday, January 17, 2009 6:00 AM > Subject: Re: [R] Where to find the source codes for the internal function in > stats package > > >> On 17/01/2009 2:23 AM, zhijie zhang wrote: >>> >>> Dear all, >>> I want to see the source codes for "dchisq(x, df, ncp=0, log = FALSE)", >>> but cannot find it. >>> I input "dchisq" in the R interface, and then enter, the following >>> message >>> return: >>>> >>>> dchisq >>> >>> /*****************************************************/ >>> function (x, df, ncp = 0, log = FALSE) >>> { >>> if (missing(ncp)) >>> .Internal(dchisq(x, df, log)) >>> else .Internal(dnchisq(x, df, ncp, log)) >>> } >>> <environment: namespace:stats> >>> /*****************************************************/ >>> It seems that dchisq() is the internal function in STATS package. So go >>> to "C:\Program Files\R\R-2.7.2\library\stats" to look for it. I browsed >>> the >>> files in this catalog, but it seems that i missed it. >>> Anybody can tell me how and where to find the codes, Thanks a lot. >> >> Uwe Ligges wrote a nice article on finding source in R News : >> >> Ligges, U. (2006): R Help Desk: Accessing the Sources. R News 6 (4), >> 43-45. http://cran.r-project.org/doc/Rnews/ >> >> As it explains, .Internal() calls functions in the main R binary, not in a >> package DLL. >> >> Duncan Murdoch >> >> ______________________________________________ >> 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. >> > > ______________________________________________ > 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. > ______________________________________________ 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.