numpy.polynomial.legendre.leg2poly(c)
[source]
Convert a Legendre series to a polynomial.
Convert an array representing the coefficients of a Legendre series, ordered from lowest degree to highest, to an array of the coefficients of the equivalent polynomial (relative to the “standard” basis) ordered from lowest to highest degree.
Parameters: |
c : array_like 1-D array containing the Legendre series coefficients, ordered from lowest order term to highest. |
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Returns: |
pol : ndarray 1-D array containing the coefficients of the equivalent polynomial (relative to the “standard” basis) ordered from lowest order term to highest. |
See also
The easy way to do conversions between polynomial basis sets is to use the convert method of a class instance.
>>> c = P.Legendre(range(4)) >>> c Legendre([ 0., 1., 2., 3.], [-1., 1.]) >>> p = c.convert(kind=P.Polynomial) >>> p Polynomial([-1. , -3.5, 3. , 7.5], [-1., 1.]) >>> P.leg2poly(range(4)) array([-1. , -3.5, 3. , 7.5])
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https://docs.scipy.org/doc/numpy-1.12.0/reference/generated/numpy.polynomial.legendre.leg2poly.html