[Numpy-discussion] ANN: NumPy 1.2.0
Mon Sep 29 05:33:32 CDT 2008
2008/9/29 Pauli Virtanen <email@example.com>:
> Mon, 29 Sep 2008 12:07:53 +0200, Matthieu Brucher wrote:
>>>>>> np.log(-1 + 0j)
>>>>>> np.log(-1 - 1e-99j)
>>>>>> np.log(-1 + 1e-99j)
>>> I'd guess this is typically harmless, but may lead to problems if your
>>> code relies on the choice of branch at the branch cut.
>>> Could you check if this is really the case? If log seems to work OK,
>>> then it's a problem with the test and not the functions.
>> The result is what you expected.
> Do you mean that the problem is with the test, or with the branch cut of
I don't know, but the results are :
>>> np.log(-1 + 0j)
>>> np.log(-1 - 1e-99j)
>>> np.log(-1 + 1e-99j)
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