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
