[Numpy-discussion] How do I do this?

Keith Goodman kwgoodman@gmail....
Fri Aug 29 17:16:00 CDT 2008


On Fri, Aug 29, 2008 at 3:08 PM, Christopher Barker
<Chris.Barker@noaa.gov> wrote:
> Alan G Isaac wrote:
>> Does this do what you want?
>> idx = np.abs(a)<min_value
>> a[idx] = min_value
>
> yup, that's it. I had forgotten about that kind of indexing, even though
> I used it for: a[a==0] = min_value
>
> Keith Goodman wrote:
>> If you only have integers then
>>
>>>> x
>>    array([ 1,  2, -5, -1,  0])
>>>> np.sign(x+1e-16) * np.maximum(np.abs(x), 2)
>>    array([ 2.,  2., -5., -2.,  2.])
>
> that would work, though I like Alan's better.

I thought -1 should go to -2. If not, then my attempt doesn't work.


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