The `summary' function (i.e. the generic) is defined in the "base" package, the source code of which is in src/library/base/R in the R source tree (try the file "summary.R"). There are also a number of methods defined there.
The source code is not in the R *installation*, since the code for the base/recommended packages is loaded via lazy-loaded databases. When looking for source code, it's good to check the sources, not the installation. The latest release source is at http://cran.us.r-project.org/src/base/R-2/R-2.2.1.tar.gz -roger ivo welch wrote: > dear R wizards: > > I am trying to determine how to determine (no further recursion) where > a built-in function is defined. In particular, I have decided I am > going to add sd() to the existing basic summary function, rather than > try to rewrite my own summary() function from scratch. > > So, I just installed R-2.2.1 (via gentoo; eventually I will figure out > how to get atlas/sse/sse2 working on amd64, too! PS: [a] how can I > determine whether a running S installation uses sse2, sse, and atlas? > [b] does atlas use sse2; [c] are there now modern graphics processor > routines that might speed up R, too? ok, all of these are irrelevant > sidequestions). > > then, I did a > > > summary > [not informative about which file it is defined in] > > ok, easy. Just grep. back on the unix line, > > # grep -r '1st Qu' /usr/lib/R > > which should look for this fairly unique string. to my surprise, it > was only found in R-intro.html. > > so, how would I go about looking for where R defines functions? or > has this becomes so deeply wired into fortran/C in later versions that > it can no longer be changed? > > help/advice as always appreciated. > > sincerely, > > /ivo welch > > ______________________________________________ > [email protected] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > -- Roger D. Peng | http://www.biostat.jhsph.edu/~rpeng/ ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
