We are building a package, and want to create S4 methods for both head and mean for our own BigMatrix class. Following the recommendation in "Writing R Extensions" we use exportMethods instead of export in NAMESPACE (this is described as being "clearer"). This works for head, but not for mean. Obviously we importFrom(utils, head), but don't need to do this for mean, which is imported automatically from base.
If we export(mean) rather than exportMethods(mean), it works as intended. A similar problem arises for a new generic function and an associated method, colmean, where the use of exportMethods(colmean) fails, but export(colmean) succeeds. We can build and use the package by using export instead of exportMethods, but we suspect that we're missing something that might be important to understand. Any hints or links to something we missed would be appreciated. Thanks, Jay Emerson Michael Kane -- John W. Emerson (Jay) Assistant Professor of Statistics Director of Graduate Studies Department of Statistics Yale University http://www.stat.yale.edu/~jay [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
