Martin,
Both questions are FAQs. Searches at e.g. StackOverflow might have lead you to a solution (and you can search there, key is to add the tag i.e. make [r] or [data.table] part of the search term). The first one is a generic package programming question. You can use Imports: in DESCRIPTION along with import() or importFrom() in NAMESPACE. Plenty of tutorials. The second one is more data.table specific and, per a quick glance, not directly covered in the data.table FAQ---but it has a link to https://stackoverflow.com/questions/10527072/using-data-table-package-inside-my-own-package It's a "tax" on package writing (that I grudgingly but happily) pay because it makes the indexing operations _so much easier_ than data.frame use by having non-standard evaluation just inside the [] operator as Duncan alluded to. Which is, to me, another one of the quietly cool features in data.table. Dirk -- https://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
