nabla

nabla.um

an object of class <code>um</code>.

<code>nabla</code> multiplies the I polynomials of an object of 
the <code>um</code> class.

Building customized transfer function and ARIMA models with multiple operators and parameter restrictions. Functions for model identification, model estimation (exact or conditional maximum likelihood), model diagnostic checking, automatic outlier detection, calendar effects, forecasting and seasonal adjustment. See Bell and Hillmer (1983) <doi:10.1080/01621459.1983.10478005>, Box, Jenkins, Reinsel and Ljung <ISBN:978-1-118-67502-1>, Box, Pierce and Newbold (1987) <doi:10.1080/01621459.1987.10478430>, Box and Tiao (1975) <doi:10.1080/01621459.1975.10480264>, Chen and Liu (1993) <doi:10.1080/01621459.1993.10594321>.

Jose L. Gallego

tfarima

Transfer Function and ARIMA Models

nabla function

<dl><dt>um</dt>
<dd>an object of class <code>um</code>.</dd></dl>

Arguments

Unscramble I polynomial — nabla

<dl>

<dt>um</dt>
<dd>an object of class <code>um</code>.</dd>

</dl>

nabla: Unscramble I polynomial

Description

Usage

Value

Arguments

Examples