[Numpy-discussion] Count the occurrence of a certain integer in a list of integers

Nils Wagner nwagner@iam.uni-stuttgart...
Tue Aug 7 08:22:37 CDT 2007


Alan G Isaac wrote:
> On Tue, 07 Aug 2007, Nils Wagner apparently wrote:
>   
>> I have a list of integer numbers. The entries can vary between 0 and 19. 
>> How can I count the occurrence of any number. Consider 
>>  >>> data
>> [9, 6, 9, 6, 7, 9, 9, 10, 7, 9, 9, 6, 7, 9, 8, 8, 11, 9, 6, 7, 10, 9, 7, 9, 7, 8, 9, 8, 7, 9] 
>> Is there a better way than using, e.g. 
>>     
>>>>> shape(where(array(data)==10))[1] 
>>>>>           
>> 2
>>     
>
>
> You did not say why data.count(10) is unsatisfactory ...
>
> Cheers,
> Alan Isaac
>
>
>
>
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>   
 
Thank you for all your input. To be honest I was not aware of all these
possibilities to solve my problem.
If you distribute a task among different people you will obtain
different methods of resolution.

Nils



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