A point in the time series
the value associated to the given time in the time series.
a series of time for which values must be computed. Each time must be greater than or equal to the previous one.
the values associated to the specified times, if specified.
The value a time series must pass by at a given time.
Represents cyclic variation of a time series on a yearly basis. Since years are on an open scale, a smooth interpolation of values is not waranted.
The value a time series must pass by at a given time.