On Thu, 20 Nov 2008, Sven Schreiber wrote: > Am 19.11.2008 23:08, Allin Cottrell schrieb: > > On Wed, 19 Nov 2008, Sven Schreiber wrote: > >> > >> Bottom line: IMHO gretl's import mechanism should also allow reverse > >> chronological ordering, which at present apparently it doesn't. > > > > It doesn't, but it's easy enough to reverse the data in gretl (as > > in the Cheatsheet chapter of the manual): > > > > genr sortkey = -obs > > dataset sortby sortkey > > This by itself is already interesting, and although I had checked the > relevant chapter of the guide, I didn't look in the cheatsheet chapter. > Thanks for the pointer. One follow-up question here: would 'dataset > sortby -obs' also work, or is the genr line necessary?
I think the genr line is necessary. I've now done some work on auto-reversing backwards data. Not guaranteed to work in all cases, but on some simple tests it seems OK. Allin.
