fds {rainbow}R Documentation

Create functional objects

Description

The function fds is used to create general functional objects that are not ordered by time. The function fts is used to create functional time series objects. The function sfts is used to create sliced functional time series objects, where the x variable is also a time variable.

Usage

fds(x, y, xname, yname)
fts(x, y, start = 1, frequency = 1, xname, yname)
sfts(data, period = frequency(data), start = tsp(data)[1], frequency = 1, xname, yname)

Arguments

x Numeric vector of length p.
y Matrix of size p x n representing n functions of x observed at points 1,...,p.
data An object of class ts.
period Time period of sliced functional data. For instance, period = 12 is a monthly data.
start The time of the first observation. Either a single number or a vector of two integers, which specify a natural time unit and a (1-based) number of samples into the time unit. See ts for details.
frequency The number of observations per unit of time.
xname Character string giving name of x vector. (optional)
yname Character string giving name of y vector. (optional)

Value

An object of class fds or fts or sfts.

Author(s)

Rob J Hyndman

Examples

fds(x = 1:20, y = Simulationdata$y, xname = "x", yname = "Simulated value")
fts(x = 15:49, y = Australiasmoothfertility$y, xname = "Age", 
    yname = "Fertility rate")
sfts(ts(as.numeric(ElNino$y), frequency = 12), xname = "Month", 
     yname = "Sea surface temperature")    

[Package rainbow version 1.8 Index]