poly2cheb(pol)
Convert an array representing the coefficients of a polynomial (relative to the "standard" basis) ordered from lowest degree to highest, to an array of the coefficients of the equivalent Chebyshev series, ordered from lowest to highest degree.
The easy way to do conversions between polynomial basis sets is to use the convert method of a class instance.
1-D array containing the polynomial coefficients
1-D array containing the coefficients of the equivalent Chebyshev series.
Convert a polynomial to a Chebyshev series.
>>> from numpy import polynomial as P
... p = P.Polynomial(range(4))
... p Polynomial([0., 1., 2., 3.], domain=[-1, 1], window=[-1, 1])
>>> c = p.convert(kind=P.Chebyshev)
... c Chebyshev([1. , 3.25, 1. , 0.75], domain=[-1., 1.], window=[-1., 1.])
>>> P.chebyshev.poly2cheb(range(4)) array([1. , 3.25, 1. , 0.75])See :
The following pages refer to to this document either explicitly or contain code examples using this.
numpy.polynomial.chebyshev.cheb2poly
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