March 2, 2009
5:23 p.m.
On Mon, Mar 2, 2009 at 09:34, Ravi <lists_ravi@lavabit.com> wrote:
On Monday 02 March 2009 01:58:27 Robert Kern wrote:
for i in range(len(vals)): flattened[idx[i]]+=vals[i]
flattened[idx] = vals
Assuming 'idx' and 'vals' are one-dimensional arrays, that should be flattened[ idx[:numpy.size(vals)] ] += vals or flattened[ idx ] += vals if 'vals' and 'idx' have the same size.
Oops. I missed the +. Actually, neither of these will work when idx has repeated indices. Instead, use: flattened += np.bincount(idx, vals) -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco