This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English version of the page.

Note: This page has been translated by MathWorks. Click here to see
To view all translated materials including this page, select Country from the country navigator on the bottom of this page.


Class: LagOp

Reflect lag operator polynomial coefficients around lag zero


B = reflect(A)


Given a lag operator polynomial object A(L),B = reflect(A) negates all coefficient matrices except the coefficient matrix at lag 0. For example, given a polynomial of degree p,


the reflected polynomial B(L) is


with the same degree and dimension as A(L).


expand all

Create a LagOp polynomial and its reflection:

A = LagOp({0.8 1 0 .6});
B = reflect(A)
B = 
    1-D Lag Operator Polynomial:
        Coefficients: [0.8 -1 -0.6]
                Lags: [0 1 3]
              Degree: 3
           Dimension: 1