The key question is: > So, is there any way to overwrite droplevels.factor and > droplevels.data.frame from the base package with my functions?
There is "can" and there is "should". I don't know the answer to "can". In regard to "should", I think it is a very very bad idea. The result that someone gets depends on whether or not the new package is attached in the session. That is a recipe for hours (or days) of trying to figure out mysterious behavior. Much better, I think, is to create a new generic. Pat On 13/02/2012 11:59, Thaler,Thorn,LAUSANNE,Applied Mathematics wrote:
Dear all, I am developing a package, which bundles my most frequently used functions. One of those is a modified version of droplevels from the base package (basically, it preserves any contrast function which was used to create the factor, contrast matrices are not kept, for they could be wrong if a level is dropped). In my NAMESPACE file I've the following directives, which should export my methods: S3method(droplevels, factor) S3method(droplevels, data.frame) However, when I load my package and I try to use those functions, the dispatching mechanism calls the functions droplevels.factor and droplevels.data.frame from the _base package_. So, is there any way to overwrite droplevels.factor and droplevels.data.frame from the base package with my functions? Or do I have to create a generic function on my own? Thanks for your help. Kind Regards, Thorn ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
-- Patrick Burns pbu...@pburns.seanet.com twitter: @portfolioprobe http://www.portfolioprobe.com/blog http://www.burns-stat.com (home of 'Some hints for the R beginner' and 'The R Inferno') ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
