FData is a reference class which represents general independent and
identically distributed (i.i.d.) functional objects. The data can be ordered
by time (functional time series). In the last case, the field X
represents
the time.
X
Numeric vector of length m representing the covariates/inputs.
Y
Matrix of size \((n, m)\) representing the observed
responses/outputs. Y
consists of n functions of X
observed at
points \(1,\dots,m\).