Output of Built-In Numpy Function to an Array?

Question

The code I am writing (among other things) calculates the coefficients of the Legendre polynomial fit of my data. I am writing it to do this in a piecewise fashion on my dataset, due to the presence of discontinuities in the data. I'm having no problem getting the coefficients returned using

numpy.polynomial.legendre.Legendre.fit()

but I need my output to be arrays. When I try to have the coefficients output to an array using array.append() on an empty array, I'm getting the following error message:

TypeError: 'builtin_function_or_method' object has no attribute '__getitem__'

Could someone advise me on how to get around this? Thanks!

EDIT: My problem stemmed from using square brackets where I should have used parentheses. However, I couldn't see the forest for the trees, and it helped to get responses!

Answer 1

Try using

numpy.append(array, values)

in place of

array.append(values).