[R] How to see a R function's code

Jeff Newmiller jdnewmil at dcn.davis.CA.us
Sun Mar 8 02:45:28 CET 2015

Most (perhaps all) packages are byte-compiled now. You can often see decompiled code by entering the name of the function without parentheses, or using the getAnywhere function. For base R functions you should probably download the R source tar file separately and unpack it to a convenient location of your choice and dig in.
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On March 7, 2015 2:52:51 PM PST, TeeJay <tommesmcpommes at gmx.net> wrote:
>Hi there,
>I know this is quite an old post but I am wondering if the answer still
>I would like to access the boxplot function. So, I tried to follow the
>instruction of Uwe Ligges’s article  “Accessing the Sources”
><http://cran.r-project.org/doc/Rnews/Rnews_2006-4.pdf>  . However, in
>“$RHOME/src/library/” there is no graphics folder! At this location I
>have a “windlgs” folder. I have a graphics folder in “$RHOME/library/”
>though. But I am not able to find a “plot.R” in any of the subfolders
>mentioned in Uwe’s article.
>Furthermore, if I debug into the boxplot function in RStudio, I get a
>warning stating “Debug location is approximate because the source is
>I already tried to reinstall R but that also did not add the “graphics”
>folder to the “src” folder. Any ideas are appreciated a lot!
>View this message in context:
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