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Member of the linalgebra class.

Syntax

c = compan(a)

Description

Returns the companion matrix to a polynomial.

Examples

Inputs

Name	Description
a	Specifies the coefficients of a polynomial in descending order of power. The first element in a is the leading coefficient of the polynomial, which is 1 for a monic polynomial. Therefore, an input vector of size n produces a companion matrix of size (n-1)-by-(n-1). a is a vector.

Outputs

Name	Description
c	Returns the companion matrix of a. The size of c equals the order of a.

Examples

A = [1, 2, 3, 4]
C = compan(A)