John Darrington <j...@darrington.wattle.id.au> writes: > Maybe Ben has some ideas how an efficient distance matrix can > be implemented in PSPP (maybe sparse-array.c can help?) .
I think that the nearest-neighbor problem is still a research area. There are many algorithms to implement it and related algorithms (e.g. approximate nearest neighbor). I have textbooks that describe several of them. I don't yet see how sparse-array.c helps. (It's only a 1-D array, for one thing.) -- Ben Pfaff http://benpfaff.org _______________________________________________ pspp-dev mailing list pspp-dev@gnu.org http://lists.gnu.org/mailman/listinfo/pspp-dev
