Jan. 22, 2014
5:32 p.m.
On Wed, 2014-01-22 at 17:23 +0000, Ralf Juengling wrote:
Executing the following code,
import numpy as np
a = np.zeros((3,))
w = np.array([0, 1, 0, 1, 2])
v = np.array([10.0, 1, 10.0, 2, 9])
a[w] += v
I was expecting ‘a’ to be array([20., 3., 9.]. Instead I get
a
array([ 10., 2., 9.])
This with numpy version 1.6.1.
Is there another way to do the accumulation I want?
Since you have addition, you should use np.bincount - Sebastian
Thanks, Ralf
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