Douglas Bates wrote: > On 3/26/07, "José Luis Aznarte M." <[EMAIL PROTECTED]> wrote: > >> Hi! I've been browsing through the last months' archive and I can't >> find an answer to my question, so here it is (let's hope it's not too >> obvious): >> I'm working on extensions of an R library, and I would be very >> surprised if everyone developing R packages is doing the following, as I do: >> >> 1.- Write down a modification of an R file >> 2.- Exit the current R session >> 3.- Install the package as root (sudo R CMD INSTALL...) >> 4.- Launch a new R session >> 5.- Test the change, if it does not work, go back to 1 or debug. >> 6.- Finish. >> >> Is this the proper (but quite awkward) way to proceed or there is an >> alternative to skip steps 2 to 4? I'm using emacs with ESS under linux. >> > > John Chambers has provided an alternative approach of using > > trace(fname, edit = TRUE) > > where fname is the name of your function. (Make sure that the server > for emacsclient has been started in your emacs session with M-x > server-start.) This opens an emacs buffer containing the source for > the function which you can then edit. After writing the file and > closing the client (C-x #) your ESS session has the new definition > installed in the package's namespace. > > This will work even for objects hidden in the namespace. The argument > "signature" allows you to edit S4 methods on the fly like this. In my > experience you cannot edit registered S3 methods like this but it may > be that I am just not using trace correctly. > Indeed, trace() does not currently work for registered S3 methods, with or without the edit=TRUE argument.
There is a fix, just committed to r-devel, which should be in the final 2.5.0. > Of course you must copy the modified version of the source code to > your package sources when you are done. > > As others have indicated, it is a good practice to install development > versions of packages in a private library so you do not need to use > sudo or worry about messing up system-wide directories. > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > > [[alternative HTML version deleted]]
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