gcmr (version 0.2)

polio: Polio Time Series

Description

Time series of Polio incidences in U.S.A. from 1970 to 1983.

Usage

data(polio)

format

A data frame with the 168 monthly observations (from January 1970 to December 1983) with the following variables ll{ y time series of polio incidences. t*10^(-3) linear trend multiplied by factor $10^(-3)$. cos(2*pi*t/12) cosine annual seasonal component. sin(2*pi*t/12) sine annual seasonal component. cos(2*pi*t/6) cosine semi-annual seasonal component. sin(2*pi*t/6) sine semi-annual seasonal component. }

source

Zeger, S.L. (1988). A regression model for time series of counts. Biometrika 75, 822--835.

Examples

data(polio)