Full_Name: Gavin Simpson Version: 2.5.0 OS: Linux (FC5) Submission from: (NULL) (128.40.33.76)
Screeplots are a common plot-type used to interpret the results of various ordination methods and other techniques. A number of packages include ordination techniques not included in a standard R installation. screeplot() works for princomp and prcomp objects, but not for these other techniques as it was not designed to do so. The current situation means, for example, that I have called a function Screeplot() in one of my packages, but it would be easier for users if they only had to remember to use screeplot() to generate a screeplot. I would like to request that screeplot be made generic and methods for prcomp and princomp added to R devel. This way, package authors can provide screeplot methods for their functions as appropriate. I have taken a look at the sources for R devel (from the SVN repository) in file princomp-add.R and prcomp.R and it looks a relatively simple change to make screeplot generic. I would be happy to provide patches and documentation if R Core were interested in making this change - I haven't done this yet as I don't want to spend time doing something that might not be acceptable to R core in general. Many thanks, G ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
