var.fd: Variance and Covariance Surfaces for a Functional Data Object
Description
Compute the variance and covariance functions for
functional data. These are two-argument functions, and therefore define
a surface. If there is one functional data object supplied, its variance
is computed. If there are two, the covariance between the two is
computed. Both functional data objects must be univariate.
Usage
var.fd(fdobj1, fdobj2=fdobj1)
Arguments
fdobj1
a univariate functional data object.
fdobj2
a univariate functional data object.
Value
a two-argument or bivariate functional data object representing the variance
surface for a single functional data object or the covariance
between two functional data objects.