On Mon, Aug 26, 2013 at 1:28 AM, Martyn Plummer <plumm...@iarc.fr> wrote: > I think rgl should be in Depends. You are providing a method for a > generic function from another package. In order to use your method, you > want the user to be able to call the generic function without scoping > (i.e. without calling rgl::plot3d), so the generic should be on the > search path, so the package that provides it should be listed in Depends > in the NAMESPACE file.
You can re-export an imported object, but it has to be done via an explicit export(), cf. "It is possible to export variables from a namespace which it has imported from other namespaces: this has to be done explicitly and not via exportPattern" [Writing R Extensions]. /H > > Martyn > > On Fri, 2013-08-23 at 22:01 -0600, Gavin Simpson 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 >> > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
