On Tue, Jun 5, 2012 at 1:17 AM, Benjamin Root <ben.r...@ou.edu> wrote: > > > On Monday, June 4, 2012, Chris Barker wrote: >> >> On Mon, Jun 4, 2012 at 11:10 AM, Patrick Redmond <plredm...@gmail.com> >> wrote: >> > Here's how I sorted primarily by field 'a' descending and secondarily by >> > field 'b' ascending: >> >> could you multiply the numeric field by -1, sort, then put it back -- >> somethign like: >> >> data *- -1 >> data_sorted = np.sort(data, order=['a','b']) >> data_sorted *= -1 >> >> (reverse if necessary -- I lost track...) >> >> -Chris > > > > While that may work for this users case, that would not work for all dtypes. > Some, such as timedelta, datetime and strings would not be able to be > multiplied by a number. > > Would be an interesting feature to add, but I am not certain if the negative > sign notation would be best. Is it possible for a named field to start with > a negative sign?
Maybe add a reverse= argument (named after the corresponding argument to list.sort and __builtins__.sorted). # sorts in descending order, no fields required np.sort([10, 20, 0], reverse=True) # sorts in descending order np.sort(rec_array, order=("a", "b"), reverse=True) # ascending by "a" then descending by "b" np.sort(rec_array, order=("a", "b"), reverse=(False, True)) ? -n _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion