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Member of the linear systems class.

Syntax

b = polystab(a)

Description

Stabilizes a polynomial by ensuring that all roots of the polynomial a are located within the unit circle. If a root is located outside of the unit circle, polystab uses a circle-based geometric reflection to reflect the root inside of the unit circle.

Examples

Inputs

Name	Description
a	Specifies a polynomial.

Outputs

Name	Description
b	Returns a stabilized polynomial.

Examples

a = rand(1, 6);
b = polystab(a);
ra = roots(a);
rb = roots(b);
plot(real(ra), imag(ra), 'ro', real(rb), imag(rb), 'b*')

Related Topics

poly
polyscale
roots