`numpy.polynomial.legendre:legsub`

source: build-install/usr/lib/python3.14/site-packages/numpy/polynomial/legendre.py :364

Signature

def legsub ( c1 , c2 )

Summary

Subtract one Legendre series from another.

Extended Summary

Returns the difference of two Legendre series c1 - c2. The sequences of coefficients are from lowest order term to highest, i.e., [1,2,3] represents the series P_0 + 2*P_1 + 3*P_2.

Parameters

c1, c2 : array_like: 1-D arrays of Legendre series coefficients ordered from low to high.

Returns

out : ndarray: Of Legendre series coefficients representing their difference.

Notes

Unlike multiplication, division, etc., the difference of two Legendre series is a Legendre series (without having to "reproject" the result onto the basis set) so subtraction, just like that of "standard" polynomials, is simply "component-wise."

Examples

from numpy.polynomial import legendre as L
c1 = (1,2,3)
c2 = (3,2,1)
L.legsub(c1,c2)
L.legsub(c2,c1) # -C.legsub(c1,c2)

✓

Aliases

numpy.polynomial.Legendre._sub
numpy.polynomial.legendre.legsub