[Numpy-discussion] Compound conditional indexing

Gökhan Sever gokhansever@gmail....
Wed Sep 30 14:40:06 CDT 2009


Thanks this works.

My second question how to access a second array using this condition?

I am trying slice another array using a compound condition on the reference
array.

say:

a = 1,2,3,4,5,
b = 20,30,40,50,60

I want to get elements of a only when a = 3,4. I know I need indices but how
?



On Wed, Sep 30, 2009 at 1:32 PM, Joe Kington <jkington@wisc.edu> wrote:

> There may be a more elegant way, but:
>
> In [2]: a = np.arange(10)
>
> In [3]: a[(a>5) & (a<8)]
> Out[3]: array([6, 7])
>
>
> On Wed, Sep 30, 2009 at 1:27 PM, Gökhan Sever <gokhansever@gmail.com>wrote:
>
>> Hello,
>>
>> How to conditionally index an array as shown below :
>>
>> a = arange(10)
>> a[5<a<8]
>>
>> to get
>> array([6,7])
>>
>> I can't do this with where either.
>>
>> What is the cure for this?
>>
>> Thanks.
>>
>> --
>> Gökhan
>>
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>>
>
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-- 
Gökhan
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