var.fd {fda}R Documentation

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.

See Also

mean.fd, std.fd, stddev.fd


[Package fda version 1.1.6 Index]