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dse (version 2003.6-1)

Polynomials: Polynomial Utilities

Description

Polynomial utility functions used by DSE.

Usage

characteristic.poly(A)
    companion.matrix(A)
    poly.value(coef, z)
    polydet(A)
    polyprod(a, b)
    polysum(a, b)
    polyroot.det(A)

Arguments

A
An array representing a matrix polynomial.
B
An array representing a matrix polynomial.
a
An array representing a matrix polynomial.
b
An array representing a matrix polynomial.
coef
Coefficients of a polynomial.
z
Value at which the polynomial is to be evaluated.

Value

  • depends

Details

These are utility functions used in some ARMA model calculations such as root and stability calculations.

See Also

polyroot roots stability