Grief with a complex value

Colin J. Williams cjw at sympatico.ca
Thu Nov 9 13:01:15 CST 2006



Stefan van der Walt wrote:
> On Thu, Nov 09, 2006 at 03:18:57AM -0500, Colin J. Williams wrote:
>   
>>  >>> import numpy.core as _n
>>  >>> _nt= _n.numerictypes
>>  >>> value= 
>> '\x00\x00\x00\x00\x00\x00\xf0?\x00\x00\x00\x00\x00\x00\x00@\x00\x00\x00\x00\x00\x00\x08@\x00\x00\x00\x00\x00\x00\x10@\x00\x00\x00\x00\x00\x00\x14@\x00\x00\x00\x00\x00\x00\x18@'
>>  >>> _n.array(value, dtype= _nt.complex128, copy=True)
>> Traceback (most recent call last):
>>   File "<interactive input>", line 1, in <module>
>> TypeError: a float is required
>>  >>>
>>     
>
> If I understand correctly, you would like to create an array from a
> buffer:
>
> In [12]: N.frombuffer(value,dtype=N.complex128)
> Out[12]: array([ 1.+2.j,  3.+4.j,  5.+6.j])
>
> Cheers
> Stéfan
>   
Thanks, I didn't find "frombuffer" in the Numpy Examples List. 

Incidentally, the List is a big help but it would be even better if it 
included the signatures of the functions.

Colin W.
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