read.table reads data into a data frame
attach makes names of column variables available
ts produces a time series object
aggregate creates an aggregated series
ts.plot produces a time plot for one or more series
window extracts a subset of a time series
time extracts the time from a time series object
ts.intersect creates the intersection of one or more time series
cycle returns the season for each value in a series
decompose decomposes a series into the components
trend, seasonal effect, and residual
stl decomposes a series using loess smoothing
summary summarises an R object
