unitcircle: Unit circle

In tfarima: Transfer Function and ARIMA Models

Unit circle

Description

unitcircle plots the inverse roots of a lag polynomial together the unit circle.

Usage

unitcircle(lp, ...)

## Default S3 method:
unitcircle(lp, ...)

## S3 method for class 'lagpol'
unitcircle(lp, s = 12, ...)

Arguments

lp	an object of class lagpol.
...	additional arguments.
s	integer, seasonal period.

Value

unitcircle returns a NULL value.

Examples

unitcircle(as.lagpol(c(1, rep(0, 11), -1)))

tfarima documentation built on Nov. 5, 2025, 7:43 p.m.