eval.posfd: Evaluate a Positive Functional Data Object
Description
Evaluate a positive functional data object at specified argument values,
or evaluate a derivative of the functional object.
Usage
eval.posfd(evalarg, Wfdobj, Lfdobj=int2Lfd(0))
Arguments
evalarg
a vector of argument values at which the functional data object is to be
evaluated.
Wfdobj
a functional data object that defines the positive function to be
evaluated. Only univariate functions are permitted.
Lfdobj
a nonnegative integer specifying a derivative to be evaluated. AT
this time of writing, permissible derivative values are 0, 1 or 2.
A linear differential operator is not allowed.
Value
a matrix containing the positive function
values. The first dimension corresponds to the argument values in
evalarg and
the second to replications.
Details
A positive function data object $h(t)$ is defined by $h(t) =[exp Wfd](t)$.
The function Wfdobj that defines the positive function is
usually estimated by positive smoothing function
smooth.positive