[Numpy-discussion] Medians that ignore values

[Stefan Van der Walt]

On 19 Sep 2008, at 16:07 , Alan G Isaac wrote:
> On 9/19/2008 4:35 AM David Cournapeau apparently wrote:
>> I never use NaN as missing value
>
> What do you use?

Masked arrays.  Using NaN's for missing values is dangerous.  You may  
do some operation, which generates invalid results, and then you have  
a mixed bag of missing and invalid values.

Cheers
Stéfan