gcmr (version 0.7.0)

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)