numpy.polynomial.laguerre.lagcompanion

numpy.polynomial.laguerre.lagcompanion(cs)

Return the companion matrix of cs.

The unscaled companion matrix of the Laguerre polynomials is already symmetric when cs represents a single Laguerre polynomial, so no further scaling is needed.

Parameters :

cs : array_like

1-d array of Laguerre series coefficients ordered from low to high degree.

Returns :

mat : ndarray

Companion matrix of dimensions (deg, deg).

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