[Numpy-discussion] Computing Simple Statistics When Only they Frequency Distribution is Known

Charles R Harris charlesr.harris@gmail....
Sun Nov 29 19:33:49 CST 2009


On Sun, Nov 29, 2009 at 6:15 PM, Anne Archibald
<peridot.faceted@gmail.com>wrote:

> 2009/11/28 Wayne Watson <sierra_mtnview@sbcglobal.net>:
> > Anne Archibald wrote:
> >> 2009/11/28 Wayne Watson <sierra_mtnview@sbcglobal.net>:
> >>
> >>> I was only illustrating a way that I would not consider, since the
> >>> hardware has already created the pdf. I've already coded it pretty much
> >>> as you have suggested. As I think I mention ed above, I'm a bit
> >>> surprised numpy doesn't provide the code you suggest as part of some
> >>> function. CalcSimplefromPDF(xvalues=mydatarray, avg=ture, minmax=true,
> >>> ...).
> >>>
> >>
> >> Feel free to submit an implementation to numpy's issue tracker. I
> >> suggest modifying mean, std, and var (at least) so that, like average,
> >> they take an array of weights.
> >
> > How would I do that?
> >
>
> Obtain a copy of recent numpy source code - a .tar file from the
> website, or using SVN, or git. Then add the feature plus some tests,
> confirm that the tests pass, and post a request and your patch to the
> bug tracker.
>
>
You might also want to use average as a starting point.

Chuck
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