On Tue, Oct 18, 2016 at 4:18 PM, Allan Haldane <allanhald...@gmail.com>
wrote:

## Advertising

> As for whether it should default to "True" or "False", the arguments I
> see are:
>
> * False, because that is the way most functions like `np.ma.sum`
> already work, as well as matlab and octave's similar "nanconv".
>
> * True, because its effects are more visible and might lead to less
> surprises. The "False" case seems like it is often not what the user
> intended. Eg, it affects the overall normalization of normalized
> kernels, and the choice of 0 seems arbitrary.
>
> If no one says anything, I'd probably go with True
>
I also have serious concerns about if it ever actually makes sense to use
`propagate_mask=False`.
So, I think it's definitely appropriate to default to `propagate_mask=True`.

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