gamlss.data (version 6.0-1)

usair: US air pollution data set

Description

US air pollution data set taken from Hand et al. (1994) data set 26, USAIR.DAT, originally from Sokal and Rohlf (1981).

Usage

data(usair)

Format

A data frame with 41 observations on the following 7 variables.

y

a numeric vector: sulpher dioxide concentration in air mgs. per cubic metre in 41 cities in the USA

x1

a numeric vector: average annual temperature in degrees F

x2

a numeric vector: number of manufacturers employing >20 workers

x3

a numeric vector: population size in thousands

x4

a numeric vector: average annual wind speed in miles per hour

x5

a numeric vector: average annual rainfall in inches

x6

a numeric vector: average number of days rainfall per year

References

Hand, D. J., Daly, F., Lunn, A. D., McConway, K. J. and Ostrowski, E. (1994), A handbook of small data sets, Chapman and Hall, London.

Examples

# NOT RUN {
data(usair)
str(usair) 
plot(usair)
# a possible gamlss model
# gamlss(library)
#ap<-gamlss(y~cs(x1,2)+x2+x3+cs(x4,2)+x5+cs(x6,3)+x4:x5, 
#               data=usair, family=GA(mu.link="inverse"))
# 
# }