Hi, I am a bit unsure about using imports in packages and have a few questions. I'm sure the answer to some of these is 'it depends', but I'm interested in what others think and 'best practices' when this is the case.
1) If I use an import or importFrom declaration in a NAMESPACE, should I also qualify the package in calls to the imported function (e.g. maptools::readShapePoly)? 2) If the 'best practice' is to qualify the calls, when does one stop; e.g. is it good/bad to say base::sapply? 3) If one is calling a (S3) generic, should one qualify the namespace? Can this cause problems? 4) Is it better to check for arguments that are missing, or use a default value of, say, NA; i.e. is missing(arg) preferable to is.na(arg)? 5) I would like to declare a (S3) generic 'cleanup(x)' but 'cleanup(...)' already exists in R.utils, which my package depends on. Should I do it? 6) I am used to writing 'requires(package)' for each package I use within a function. If I have used import or importFrom in my NAMESPACE, should I still do this? Looking forward to your advice, Simon Knapp ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
