[SciPy-dev] modulo operation and new scipy core
Travis Oliphant
oliphant at ee.byu.edu
Wed Oct 12 05:04:43 EDT 2005
Arnd Baecker wrote:
>Hi,
>
>one thing which I find irritating is the behaviour of
>the modulo operation for arrays:
>
>Compare:
>
>In [1]: from scipy import *
>In [2]: -0.4 % 1.0
>Out[2]: 0.59999999999999998
>In [3]: x=arange(-0.6,1.0,0.1)
>In [4]: x%1.0
>Out[4]:
>array([ -6.00000000e-01, -5.00000000e-01, -4.00000000e-01,
> -3.00000000e-01, -2.00000000e-01, -1.00000000e-01,
> 1.11022302e-16, 1.00000000e-01, 2.00000000e-01,
> 3.00000000e-01, 4.00000000e-01, 5.00000000e-01,
> 6.00000000e-01, 7.00000000e-01, 8.00000000e-01,
>
>
> 9.00000000e-01])
>
>
By the way (get current SVN first).
you can change the behavior of all the array operations using.
from scipy.base.multiarray import set_numeric_ops
For example (after from scipy import mod)
set_numeric_ops(remainder=mod)
will give you the behavior you seek.
-Travis
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