[Numpy-discussion] More numpy and Numeric differences

Colin J. Williams cjw at sympatico.ca
Mon Feb 13 19:56:09 CST 2006


Travis Oliphant wrote:

> Pearu Peterson wrote:
>
>>
>> I have created a wiki page
>>
>>   http://scipy.org/PearuPeterson/NumpyVersusNumeric
>>
>> that reports my findings on how numpy and Numeric behave on various 
>> corner cases. Travis O., could you take a look at it?
>> Here is the most recent addition:
>>
> I fixed the put issue.  The problem with clip is actually in choose 
> (clip is just a specific application of  choose).
> The problem is in PyArray_ConvertToCommonType.  You have an integer 
> array, an integer scalar, and a floating-point scalar.
> I think the rules implemented in PyArray_ConvertToCommonType are not 
> allowing the scalar to dictate anything.  But, this should clearly be 
> changed to allow scalars of different "kinds" to up-cast the array.  
> This would be consistent with the umath module.
>
> So, PyArray_ConvertToCommonType needs to be improved.  This will have 
> an impact on several other functions that use this C-API.
>
> -Travis
>
A numarray vs numpy would be helpful for some of us.

Colin W.




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