tfarima (version 0.3.2)

phi: Unscramble AR polynomial

Description

phi multiplies the AR polynomials of an object of the um class.

Usage

phi(um)
# S3 method for um
phi(um)

Arguments

um

an object of class um.

Value

A numeric vector c(1, a1, ..., ad)

Examples

# NOT RUN {
um1 <- um(ar = "(1 - 0.8B)(1 - 0.5B)")
phi(um1)

# }