On 11/11/06, Lisandro Dalcin <[EMAIL PROTECTED]> wrote:
In [1]: int32(0)/int32(0)
Warning: divide by zero encountered in long_scalars
Out[1]: 0
In [2]: float32(0)/float32(0)
Out[2]: nan
In [3]: int(nan)
Out[3]: 0L
I think it was just a default for numpy. Hmmm, numpy now warns on integer division by zero, didn't used to. Looks like a warning should also be raised when casting nan to integer. It is probably a small bug not to. I also suspect int(nan) should return a normal python zero, not 0L.
Chuck
On 11/11/06, Stefan van der Walt <[EMAIL PROTECTED]> wrote:
> NaN (or inf) is a floating point number, so seeing a zero in integer
> representation seems correct:
>
> In [2]: int(N.nan)
> Out[2]: 0L
>
Just to learn myself: Why int(N.nan) should be 0? Is it C behavior?
In [1]: int32(0)/int32(0)
Warning: divide by zero encountered in long_scalars
Out[1]: 0
In [2]: float32(0)/float32(0)
Out[2]: nan
In [3]: int(nan)
Out[3]: 0L
I think it was just a default for numpy. Hmmm, numpy now warns on integer division by zero, didn't used to. Looks like a warning should also be raised when casting nan to integer. It is probably a small bug not to. I also suspect int(nan) should return a normal python zero, not 0L.
Chuck
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