Cycle Plot for Seasonal Effects of an Univariate Time Series

Plot seasonal effects of a univariate time series following Cleveland's definition for cycle plots.

PlotMonth(x, type = "l", labels, xlab = "", ylab = deparse(substitute(x)), ...)

Arguments

x: univariate time series
type: one out of "l" (line) or "h" (histogram), defines the plot type of the year components
labels: the labels for the cyclic component to be displayed on the x-axis
xlab: a title for the x axis: see title.
ylab: a title for the y axis: see title.
...: the dots are passed to the plot command.

Details

A cycle plot is a graphical method invented to study teh behaviour of a seasonal time series. The seasonal component of a univariate series is graphed. First the January values are graphed for successive years, then the February values and so forth. For each monthly subseries the mean of the values is portrayed by a horizontal line.

Author

Markus Huerzeler (ETH Zurich), slight changes Andri Signorell <andri@signorell.net>

References

Cleveland, W. S. (1985) The Elements of Graphing Data. Monterey, CA: Wadsworth.

Examples

PlotMonth(AirPassengers)