Python | Numpy np.cheb2poly() method
Last Updated :
03 Nov, 2019
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With the help of
Python3 1=1
Python3 1=1
np.cheb2poly()
method, we can get the polynomial from chebyshev series by using np.cheb2poly()
method.
Syntax : np.cheb2poly(array)
Return : Return array having coefficients of polynomial.
Example #1 :
In this example we can see that by using np.cheb2poly()
method, we are able to get the polynomial from chebyshev series by using this method.
# import numpy
import numpy as np
from numpy import polynomial as P
x = np.array([2, 5, 7])
# using np.cheb2poly() method
gfg = P.Chebyshev(x)
gfg = gfg.convert(kind = P.Polynomial)
gfg = P.chebyshev.cheb2poly(gfg)
print(gfg)
[Polynomial([-5., 5., 14.], domain=[-1., 1.], window=[-1., 1.])]Example #2 :
# import numpy
import numpy as np
from numpy import polynomial as P
x = np.array([2, 3, 5, 7, 11])
# using np.cheb2poly() method
gfg = P.Chebyshev(x)
gfg = gfg.convert(kind = P.Polynomial)
gfg = P.chebyshev.cheb2poly(gfg)
print(gfg)
[Polynomial([8., -18., -78., 28., 88.], domain=[-1., 1.], window=[-1., 1.])]