Hello all, A further update for gretl's "R_functions" apparatus: it's now possible to traffic in gretl bundles. * You can pass a gretl bundle as an argument to an R function; it will be converted to an R "list", with tags corresponding to the bundle keys. * You can return an R list from an R function and it will be converted to a gretl bundle -- provided that all elements of the list have associated tags. (Tags are optional for native R lists, but they're not optional for conversion to a gretl bundle.) There are certain restrictions (some of which may eventually be relaxed). At present a gretl bundle to be passed to R can contain only these gretl types: scalar, (real) matrix, string, array of strings, and bundle. Similarly in the other direction: an R list to be converted to a gretl bundle can contain only elements which directly correspond to the gretl types just mentioned. Allin