[SciPy-user] possible to get INF in divide by zero ?
Pauli Virtanen
pav@iki...
Fri Aug 29 07:23:33 CDT 2008
Thu, 28 Aug 2008 09:56:36 +0200, Stef Mientki wrote:
> another observation:
>
> >>> a=numpy.array([2,3])
> >>> a/0
> array([0, 0])
Division in Numpy preserves the data types: in this case you have an
integer array divided by an integer, so the output is also an integer.
But Inf is not one of integers so something must be substituted; and it
is zero. There probably was some reason for this choice...
If you change your seterr configuration frmo divide='ignore' you should
get a warning, see
http://mentat.za.net/numpy/refguide/routines.math.xhtml#numpy.divide
--
Pauli Virtanen
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