[Numpy-discussion] float64 / int comparison different from float / int comparison
Chris.Barker
Chris.Barker at noaa.gov
Tue Nov 1 11:39:54 EDT 2011
On 10/31/11 6:38 PM, Stéfan van der Walt wrote:
> On Mon, Oct 31, 2011 at 6:25 PM, Matthew Brett<matthew.brett at gmail.com> wrote:
>> Oh, dear, I'm suffering now:
>> In [12]: res> 2**31-1
>> Out[12]: array([False], dtype=bool)
> I'm seeing:
...
> Your result seems very strange, because the numpy scalars should
> perform exactly the same inside and outside an array.
I get what Stéfan gets:
In [32]: res = np.array((2**31,), dtype=np.float32)
In [33]: res > 2**31-1
Out[33]: array([ True], dtype=bool)
In [34]: res[0] > 2**31-1
Out[34]: True
In [35]: res[0].dtype
Out[35]: dtype('float32')
In [36]: np.__version__
Out[36]: '1.6.1'
(OS-X, Intel, Python2.7)
Something is very odd with your build!
-Chris
--
Christopher Barker, Ph.D.
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Chris.Barker at noaa.gov
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