numpy.polynomial.hermite.hermsub(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, c2 : array_like

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

Returns :

out : ndarray

Of Hermite series coefficients representing their difference.


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.”


>>> from numpy.polynomial.hermite import hermsub
>>> hermsub([1, 2, 3, 4], [1, 2, 3])
array([ 0.,  0.,  0.,  4.])

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