Lists are vectors, but as long as they aren't doing too much C++, or assert specific types, it should work. Functions like length(), names(), [, etc dispatch to both S3 and S4.
On Thu, Apr 23, 2015 at 6:11 PM, Ryan Thompson <r...@thompsonclan.org> wrote: > It looks like dplyr has support for base R lists as columns in data > frames: > http://cran.r-project.org/web/packages/dplyr/vignettes/data_frames.html > > Hopefully that feature is flexible enough to accommodate anything that > looks sufficiently like a vector. Is love to give this a try, but I can't > find anything on what specifically needs to be implemented for a new dplyr > backend. > In theory, probably not that hard. DataFrame implements methods on > primitive and S3 generics, so even the darkest shadows of the S3 world will > dispatch correctly on those. One potential roadblock is that dplyr may > assume that all columns are base R vectors, which would obviously fail for > stuff like Rle. Ideally, the data.frame implementation of dplyr has > restricted itself to some subset of the base R API, without diving down > into C++, except through dispatch. But that might be too idealistic. Good > luck, I'm interested to see what you come up with. > > Michael > > > On Thu, Apr 23, 2015 at 4:06 PM, Ryan C. Thompson <r...@thompsonclan.org> > wrote: > >> Hi all, >> >> So, dplyr is a pretty cool thing, but it currently works with data.frame >> and data.table, but not S4Vectors::DataFrame. I'd like to change that if >> possible, and I assume that this would "simply" involve writing some glue >> code. However, I'm not really sure where to start, and I expect things >> might be complicated because dplyr uses S3 and S4Vectors uses S4. Can >> anyone offer any pointers? >> >> -Ryan >> >> _______________________________________________ >> Bioc-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/bioc-devel >> > > [[alternative HTML version deleted]] _______________________________________________ Bioc-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/bioc-devel
