numpy.polynomial.hermite_e.hermesub

polynomial.hermite_e.hermesub(c1, c2)[source]

Subtract one Hermite series from another.

Returns the difference of two Hermite 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 Hermite series coefficients ordered from low to high.

Returns
outndarray

Of Hermite series coefficients representing their difference.

Notes

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