numba support for numpy.roots

[Chan Y. Park]

Hi,

I wonder if numba supports numpy.roots or any other root-finding method. What I want to do is finding a root of a complex-valued polynomial p(x) near a starting point x_0. If numpy.roots are supported then it's even better, but something like Newton's method would be good enough for now.

Thanks,
Chan

[stuart]

Hi,

Thanks for your enquiry. Unfortunately, at present, numba does not support `numpy.roots` out of the box, I've added an issue for the request https://github.com/numba/numba/issues/2062.

The dependencies for implementing this function are present, so you could just create a local implementation for now. The
basic method is to simply create the companion matrix of the polynomial and then compute its eigenvalues.

Hope this helps,

--
stuart

[Chan Y. Park]

Thank you for the help!

[stuart]

Hi,

Just to let you know, the next release of Numba will have support for `numpy.roots` https://github.com/numba/numba/pull/2135

Thanks,

--
stuart

[phyg...@gmail.com]

Great, thanks!