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Member of the polynomials class.

Syntax

p = poly(z)

Description

Creates a polynomial with roots represented by an input vector or computes the characteristic polynomial of an input matrix. roots and poly are inverse operations.

Examples

Inputs

Name	Description
z	Specifies a real or complex vector or matrix. If z is a matrix, z must be square.

Outputs

Name	Description
p	Returns the coefficients in descending order of power of the polynomial with roots of z. If z is a matrix, p returns the coefficients in descending order of power of the characteristic polynomial of z. p is a real or complex vector.

Examples

Z = [1, 2, 3, 4]
P = poly(Z)
Z1 = roots(P)

Related Topics

conv
polyval
residue
roots