numpy.polynomial.laguerre.lagsub

numpy.polynomial.laguerre.lagsub(c1, c2)

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.

See also

lagadd, lagmulx, lagmul, lagdiv, lagpow

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.])