How to check for nan in an array?
Yves
yves.frederix at gmail.com
Mon Oct 30 05:53:45 EST 2006
Forget it. N.isnan() does the job.
YVES
On Mon, Oct 30, 2006 at 11:47:57AM +0100, Yves wrote:
> Hi,
>
> Is there a way of checking for nan's in an array, as comparing to N.nan
> doesn't seem to work.
>
> In [1]: import numpy as N
>
> In [2]: a = N.asarray(0.)/0
> Warning: invalid value encountered in divide
>
> In [3]: a
> Out[3]: nan
>
> In [4]: a==N.nan
> Out[4]: False
>
> In [5]: b = a.copy()
>
> In [6]: a==b
> Out[6]: False
>
> In [7]: b
> Out[7]: nan
>
> In [8]: N.__version__
> Out[8]: '1.0.dev3390'
>
>
> Many thanks,
> YVES
>
>
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