The combination of importFrom(<package>, <generic name>) S3method(<generic name>, <new class>, <new function>)
works fine for me in a toy example. I don't have OpenGL on my laptop to test your actual case but I see no reason it wouldn't work. ~G On Sun, Aug 25, 2013 at 7:29 AM, Hadley Wickham <h.wick...@gmail.com> wrote: > What I do, which is probably wrong, but at least it works, is export > the s3 method as a function. i.e. instead of > > S3method(genericfunction, myclass) > > I do > > export(genericfunction.myclass) > > Hadley > > On Fri, Aug 23, 2013 at 11:01 PM, Gavin Simpson <ucfa...@gmail.com> wrote: > > Dear List, > > > > In one of my packages I have an S3 method for the plot3d generic > > function from package rgl. I am trying to streamline my Depends > > entries but don't know how to have > > > > plot3d(foo) > > > > in the examples section for the plot3d method in my package, without > > rgl being in Depends. > > > > Note that I importFrom(rgl, plotd3d) and register my S3 method via > > S3Method() in the NAMESPACE. > > > > If rgl is not in Depends but in Imports, I see this when checking the > package > > > >> ## 3D plot of data with curve superimposed > >> plot3d(aber.pc, abernethy2) > > Error: could not find function "plot3d" > > > > I presume this is because rgl's namespace is only loaded but the > > package is not attached to the search path. > > > > Writing R extensions indicates that one can export from a namespace > > something that was imported from another package namespace. I thought > > that might help the situation, and now the code doesn't raise an > > error, I get > > > > * checking for missing documentation entries ... WARNING > > Undocumented code objects: > > plot3d > > All user-level objects in a package should have documentation entries. > > See the chapter Writing R documentation files in the Writing R > > Extensions manual. > > > > as I don't document plot3d() itself. > > > > What is the recommended combination of Depends and Imports plus > > NAMESPACE directives etc that one should use in this situation? Or am > > I missing something else? > > > > I have a similar issue with my package including an S3 method for a > > generic in the lattice package, so if possible I could get rid of both > > of these from Depends if I can solve the above issue. > > > > Thanks in advance. > > > > Gavin > > > > -- > > Gavin Simpson > > > > ______________________________________________ > > R-devel@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-devel > > > > -- > Chief Scientist, RStudio > http://had.co.nz/ > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > -- Gabriel Becker Graduate Student Statistics Department University of California, Davis [[alternative HTML version deleted]]
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