Commit ca11ad10 authored by Andreas Freise's avatar Andreas Freise
Browse files


parent bb3dc798
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
import numpy as np
import scipy.special
def jacobi(n,a,b,x):
""" Implementation of Jacobi fucntion using binominal coefficients.
This can handle values of alpha, beta < -1 which the special.eval_jacobi
function cannot."""
for s in np.arange(0,n+1):
P=P+scipy.special.binom(n+a,s) * scipy.special.binom(n+b,n-s) * (x-1.0)**(n-s) * (x+1.0)**s
return P
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