<< deconv

Polynomials

polyder >>

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poly

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Polynomial with specified roots or characteristic polynomial.

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Syntax

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p = poly(r)

p = poly(A)

Input argument

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r

vector: polynomial roots

A

matrix: input matrix

Output argument

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p

row vector: polynomial coefficients

Description

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If A is a square matrix, p = poly(A) computes an n+1 element row vector. This result is composed the coefficients of the characteristic polynomial.

If r is a vector, p = poly(r) computes a row vector. This result is composed the coefficients of the polynomial roots of which are the elements of r.

Example

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A = [1    2    3;
4    5    6;
7    8    1];
p = poly(A)

See also

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conv, roots.

History

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Version	Description
1.0.0	initial version

Author

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Allan CORNET