isStationary: Determine whether or not a time series is stationary in the mean
Description
Uses the Augmented Dickey-Fuller test to determine when the time series has a unit root.
Usage
isStationary(tsData)
Value
A boolean indicating whether or not the given time series is stationary.
Arguments
tsData
A time series object.
Details
A time series must have a minimum of three complete years of data.
For details on the implementation of the Augmented Dickey-Fuller test,
see the tseries package on cran.