Travis Oliphant wrote:
> Doesn't .view work for that?
>
> Travis
>
>
> Sent from my iPhone
>
> On Jul 29, 2009, at 6:57 AM, Neal Becker <[email protected]> wrote:
>
>> Neal Becker wrote:
>>
>>> Does numpy have functions to convert between e.g. an array of
>>> uint32 and
>>> uint8, where the uint32 array is a packed version of the uint8 array
>>> (selecting little/big endian)?
>>
>> I've been thinking about making a ufunc (in python) to do this, but
>> have no
>> idea how to make a ufunc for a function that consumes 4 consecutive
>> values
>> of it's input and produces an output array of 1/4 the size of the
>> input. Is
>> that possible?
>>
Can 'view' switch byteorder? Doesn't seem to work:
import numpy as np
a = np.arange(10, dtype=np.uint32)
b1 = a.view (np.dtype(np.uint32).newbyteorder('<'))
c1 = b1.view(np.uint8)
b2 = a.view (np.dtype(np.uint32).newbyteorder('>'))
c2 = b2.view(np.uint8)
print c1
print c2
[0 0 0 0 1 0 0 0 2 0 0 0 3 0 0 0 4 0 0 0 5 0 0 0 6 0 0 0 7 0 0 0 8 0 0 0 9
0 0 0]
[0 0 0 0 1 0 0 0 2 0 0 0 3 0 0 0 4 0 0 0 5 0 0 0 6 0 0 0 7 0 0 0 8 0 0 0 9
0 0 0]
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