[SciPy-dev] array logical ops error?
Alan G Isaac
aisaac at american.edu
Mon Oct 31 07:37:31 EST 2005
On Mon, 31 Oct 2005, Robert Cimrman apparently wrote:
> is this the expected behaviour?
> IMHO (b * c) == (b and c), (b + c) == (b or c) should hold...
I expected the Boolean operations to yield
element-by-element comparisons. What are they?? In
contrast, the + and * operators give the expected results.
>>> a=scipy.array([1,2,3,4])
>>> b= a==3
>>> c= a>3
>>> b
array([False, False, True, False], dtype=bool)
>>> c
array([False, False, False, True], dtype=bool)
>>> b and c
array([False, False, False, True], dtype=bool)
>>> b or c
array([False, False, True, False], dtype=bool)
Cheers,
Alan Isaac
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