numpy.polynomial.laguerre.lagmulx(c)
[source]
Multiply a Laguerre series by x.
Multiply the Laguerre series c
by x, where x is the independent variable.
Parameters: |
c : array_like 1-D array of Laguerre series coefficients ordered from low to high. |
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Returns: |
out : ndarray Array representing the result of the multiplication. |
The multiplication uses the recursion relationship for Laguerre polynomials in the form
xP_i(x) = (-(i + 1)*P_{i + 1}(x) + (2i + 1)P_{i}(x) - iP_{i - 1}(x))
>>> from numpy.polynomial.laguerre import lagmulx >>> lagmulx([1, 2, 3]) array([ -1., -1., 11., -9.])
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https://docs.scipy.org/doc/numpy-1.12.0/reference/generated/numpy.polynomial.laguerre.lagmulx.html