[Numpy-discussion] Medians that ignore values

Stéfan van der Walt stefan@sun.ac...
Fri Sep 19 04:10:15 CDT 2008


2008/9/19 David Cournapeau <david@ar.media.kyoto-u.ac.jp>:
> Stéfan van der Walt wrote:
>>
>> I agree completely.
>
> Me too, but I am extremely biased toward nan is always bogus by my own
> usage of numpy/scipy (I never use NaN as missing value, and nan is
> always caused by divide by 0 and co).

So am I.  In all my use cases, NaNs indicate trouble.

> Why ?

Because we have x.max() silently ignoring NaNs, which causes a lot of
head-scratching, swearing and failed experiments.

Cheers
Stéfan


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