tfarima (version 0.3.2)

nabla: Unscramble I polynomial

Description

nabla multiplies the I polynomials of an object of the um class.

Usage

nabla(um)
# S3 method for um
nabla(um)

Arguments

um

an object of class um.

Value

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

Examples

# NOT RUN {
um1 <- um(i = "(1 - B)(1 - B^12)")
nabla(um1)
# }