[Numpy-discussion] Converting bool to float

[Keith G. <kwg...@gm...>]

I had a hard time tracing a bug in my code. The culprit was this difference:

>> x

matrix([[True],
        [True],
        [True]], dtype=bool)
>> 1.0 - x

matrix([[ 0.],
        [ 0.],
        [ 0.]], dtype=float32)     <------- float32
>> 1.0*x

matrix([[ 1.],
        [ 1.],
        [ 1.]])                            <-------- float64

>> numpy.__version__
'1.0rc1'

Any chance that 1.0 - x could return dtype = float64?