Rfssa (version 2.1.0)

-.fts: Subtraction of Functional Time Series

Description

A method for functional time series (fts) subtraction and fts-scalar subtraction. Note that if the fts is multivariate then a vector of numerics may be provided allowing for subtraction of different scalars from different variables. For example, multivariate fts-numeric subtraction follows the form of Y-c(1,2) if Y is a bivariate fts.

Usage

# S3 method for fts
-(Y1, Y2)

Value

An object of class fts.

Arguments

Y1

An object of class fts or numeric.

Y2

An object of class fts or numeric.

See Also

fts

Examples

if (FALSE) {
require(Rfssa)
load_github_data("https://github.com/haghbinh/Rfssa/blob/master/data/Callcenter.RData")
D <- matrix(sqrt(Callcenter$calls), nrow = 240)
u <- seq(0, 1, length.out = 240) # Define domain of functional data
d <- 22 # number of basis elements
Y <- Rfssa::fts(list(D), list(list(d, "bspline")), list(u))
plot(Y)
Yminus <- Y[1:4] - Y[5:8] # subtract the functional time series to itself
plot(Yminus)
Yminus2 <- Y - 2 # subtract 2 to every term in the functional time series
plot(Yminus2)
}