[Numpy-discussion] On the use of adding an expfit class in or next to the polynomial module

[Stefan van der Walt]

Hi there,

Thanks for reaching out.

On Wed, Jan 27, 2021, at 04:24, Swan BOSC wrote:
> Namely, the expfit function, as presented here <https://octave.sourceforge.io/optim/function/expfit.html> (https://octave.sourceforge.io/optim/function/expfit.html) doesn't seem to exist. I'm currently building a replacement for it in my words (keywords I mean ;) ) but maybe a better solution would be to contribute some code into NumPy.
> 
> AFAIK, the preferred way to fit a Polynomial nowadays is to call `numpy.polynomial.polynomial.``Polynomial.` 
> Do you think that a class for `Exponential` based on that one would be an interesting addition to NumPy ?

I think Prony's method would probably be a better fit for `scipy.signal`.  Please be mindful not to translate this from existing GPL code, but to implement it afresh.

Best regards,
Stéfan
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