Thanks dwblas, I'll try the numpy list too.

Hi all,

I'm new to Python (and to coding in general). If anyone can help out with the problem below or point me in the right direction I'd really appreciate it.

I have a noisy dataset through which I'd like to fit the best possible cubic polynomial using the least squares method. numpy.polyfit is almost what I want, but for physical reasons there are some additional constraints on the curve:

1. It should...