expsmooth (version 2.01)

gasprice: US gasoline prices

Description

Monthly US retail gasoline price (the average price per gallon, in dollars) and the spot price of a barrel of West Texas Intermediate (WTI) oil in dollars as traded at Cushing, Oklahoma. Jan 1991 - Nov 2006.

Usage

data(gasprice)

format

bivariate time series

source

Hyndman, R.J., Koehler, A.B., Ord, J.K., and Snyder, R.D., (2008) Forecasting with exponential smoothing: the state space approach, Springer.

References

http://www.exponentialsmoothing.net. These series are available from the US Energy Information Administration website http://www.eia.doe.gov.

Examples

par(mar=c(5,4,2,5))
plot(gasprice[,1],xlab="Year",ylab="Average retail price per gallon (dollars)",main="Gasoline and oil prices")
par(new=TRUE)
plot(gasprice[,2],col="blue",xaxt="n",yaxt="n",xlab="",ylab="")
axis(4)
mtext("Spot price per barrel (dollars)",side=4,line=3)
legend("topleft",col=c("black","blue"),lty=1,legend=c("Ave retail price of gasoline","Spot price of WTI oil"))