feval-methods: Evaluating A Functional Data Object

In yixuan/fdaplus: Enhancement of the 'fda' package for functional data analysis

Description

This generic function provides methods to evaluate different types of functional data (basis function, univariate function, bivariate function) at specified argument values.

Usage

feval(f, x, ...)

## For bifd+
# feval(f, x, y, ...)

## S4 method for signature ''fourier+',numeric'
feval(f, x, ...)

## S4 method for signature ''bspline+',numeric'
feval(f, x, ...)

## S4 method for signature ''fd+',numeric'
feval(f, x, ...)

## S4 method for signature ''bifd+',numeric'
feval(f, x, y, ...)

Arguments

f	An object of class basis+, fd+, or bifd+.
x	Values that f is evaluated on.
y	Only used when f is of class bifd+, in which case f is evaluated on two arguments, x and y.
...	Additional parameters, currently unused.

Value

See Method (...) sections for the actual implementations of this generic function.

Method (fourier+, numeric)

f	-	A fourier+ object.
x	-	A numeric vector.

feval(f, x) returns a matrix R of f@ncoef rows and length(x) columns, with R[i, j] representing the value of the i-th basis function evaluated on x[j].

Method (bspline+, numeric)

f	-	A bspline+ object.
x	-	A numeric vector.

feval(f, x) returns a matrix R of f@ncoef rows and length(x) columns, with R[i, j] representing the value of the i-th basis function evaluated on x[j].

Method (fd+, numeric)

f	-	An fd+ object.
x	-	A numeric vector.

feval(f, x) returns a matrix R of n rows and length(x) columns where n is the number of function curves in f. R[i, j] equals the value of the i-th function evaluated on x[j].

Method (bifd+, numeric, numeric)

f	-	A bifd+ object.
x, y	-	Numeric vectors.

feval(f, x, y) returns a matrix R of length(x) rows and length(y) columns, with R[i, j] equal to the value of f(x[i], x[j]).

Author(s)

Yixuan Qiu <http://statr.me/>

yixuan/fdaplus documentation built on May 4, 2019, 5:29 p.m.