numpy.polynomial.laguerre.lagsub

polynomial.laguerre.lagsub(c1, c2)[source]

Subtract one Laguerre series from another.

Returns the difference of two Laguerre 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, c2array_like

1-D arrays of Laguerre series coefficients ordered from low to high.

Returns
outndarray

Of Laguerre series coefficients representing their difference.

Notes

Unlike multiplication, division, etc., the difference of two Laguerre series is a Laguerre 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.laguerre import lagsub
>>> lagsub([1, 2, 3, 4], [1, 2, 3])
array([0.,  0.,  0.,  4.])