[SciPy-user] histogram(a, normed=True) doesn't normalize?

Martin Spacek scipy at mspacek.mm.st
Mon Jun 19 20:59:13 CDT 2006

David Huard wrote:
> Yes.
> The normalization constant is not the sum of the bin, but the sum of the 
> product of the bin count with the bin width :
> \sum_i  f_i * delta_i

It seems I long ago forgot the distinction between a probability 
*distribution* function and a probability *density* function. I assumed 
they were the same thing. Thanks for the clarification.


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