[Numpy-discussion] Setting small numbers to zero.

josef.pktd@gmai... josef.pktd@gmai...
Wed Mar 17 10:57:05 CDT 2010


On Wed, Mar 17, 2010 at 11:56 AM, Keith Goodman <kwgoodman@gmail.com> wrote:
> On Wed, Mar 17, 2010 at 8:51 AM, gerardob <gberbeglia@gmail.com> wrote:
>>
>> How can i modified all the values of a numpy array whose value is smaller
>> than a given epsilon to zero?
>>
>> Example
>> epsilon=0.01
>> a = [[0.003,2][23,0.0001]]
>>
>> output:
>> [[0,2][23,0]]
>
> Here's one way:
>
>>> a = np.array([[0.003,2],[23,0.0001]])
>>> a[np.abs(a) < 0.01] = 0
>>> a
>
> array([[  0.,   2.],
>       [ 23.,   0.]])
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But as Skipper said before

You might find these helpful.

http://www.scipy.org/Tentative_NumPy_Tutorial
http://www.scipy.org/Numpy_Example_List

Josef


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