numpy.polynomial.legendre.poly2leg#
- polynomial.legendre.poly2leg(pol)[source]#
Convert a polynomial to a Legendre series.
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 Legendre series, ordered from lowest to highest degree.
- Parameters
- polarray_like
1-D array containing the polynomial coefficients
- Returns
- cndarray
1-D array containing the coefficients of the equivalent Legendre series.
See also
Notes
The easy way to do conversions between polynomial basis sets is to use the convert method of a class instance.
Examples
>>> from numpy import polynomial as P >>> p = P.Polynomial(np.arange(4)) >>> p Polynomial([0., 1., 2., 3.], domain=[-1, 1], window=[-1, 1]) >>> c = P.Legendre(P.legendre.poly2leg(p.coef)) >>> c Legendre([ 1. , 3.25, 1. , 0.75], domain=[-1, 1], window=[-1, 1]) # may vary