Polio {glarma}

Cases of Poliomyelitis in the U.S.

Description

This data set gives the monthly number of cases of poliomyelitis in the U.S. for the years 1970–1983 as reported by the Center for Disease Control. The polio data frame has 168 rows and 8 columns.

Usage

data(Polio)

Format

A data frame containing the following columns:

[, 1]	Cases	monthly number of cases of poliomyelitis.
[, 2]	Intcpt	a vector of ones, providing the intercept in the model.
[, 3]	Trend	a linear trend.
[, 4]	CosAnnual	cosine harmonics at periods of 12.
[, 5]	SinAnnual	sine harmonics at periods of 12.
[, 6]	CosSemiAnnual	cosine harmonics at periods of 6.
[, 7]	SinSemiAnnual	sine harmonics at periods of 6.

Source

Zeger, S.L (1988) A regression model for time series of counts. Biometrika, 75, 621–629.