[Numpy-discussion] how to count Nan occurrence in a ndarray?

Olivier Delalleau shish@keba...
Fri Oct 7 05:40:33 CDT 2011


You can use numpy.isnan(array).sum()

-=- Olivier

2011/10/7 Chao YUE <chaoyuejoy@gmail.com>

> The data is read from a .mat file.
>
> 2011/10/7 Chao YUE <chaoyuejoy@gmail.com>
>
>> Dear all,
>>
>> I have an ndarray with dimension of 4X62500. is there anyway I can count
>> the number of missing value (NaN)? because I want to know how many
>> observations are missing?
>>
>> Thanks for any idea,
>>
>> Chao
>>
>> --
>>
>> ***********************************************************************************
>> Chao YUE
>> Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL)
>> UMR 1572 CEA-CNRS-UVSQ
>> Batiment 712 - Pe 119
>> 91191 GIF Sur YVETTE Cedex
>> Tel: (33) 01 69 08 29 02; Fax:01.69.08.77.16
>>
>> ************************************************************************************
>>
>>
>
>
> --
>
> ***********************************************************************************
> Chao YUE
> Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL)
> UMR 1572 CEA-CNRS-UVSQ
> Batiment 712 - Pe 119
> 91191 GIF Sur YVETTE Cedex
> Tel: (33) 01 69 08 29 02; Fax:01.69.08.77.16
>
> ************************************************************************************
>
>
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>
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