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.
- c1, c2 : array_like
1-D arrays of Laguerre series coefficients ordered from low to high.
- out : ndarray
Of Laguerre series coefficients representing their difference.
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.”
>>> from numpy.polynomial.laguerre import lagsub >>> lagsub([1, 2, 3, 4], [1, 2, 3]) array([0., 0., 0., 4.])