fdars (version 0.3.3)

semimetric.basis: Semi-metric based on Basis Expansion

Description

Computes a semi-metric based on the L2 distance of basis expansion coefficients. Supports B-spline and Fourier basis.

Usage

semimetric.basis(
  fdataobj,
  fdataref = NULL,
  nbasis = 5,
  basis = "bspline",
  nderiv = 0,
  ...
)

Value

A distance matrix based on basis coefficients.

Arguments

fdataobj

An object of class 'fdata'.

fdataref

An object of class 'fdata'. If NULL, uses fdataobj.

nbasis

Number of basis functions. Default is 5.

basis

Type of basis: "bspline" (default) or "fourier".

nderiv

Derivative order to compute distance on (default 0).

...

Additional arguments (ignored).

Examples

# Create curves
t <- seq(0, 1, length.out = 100)
X <- matrix(0, 10, 100)
for (i in 1:10) X[i, ] <- sin(2*pi*t + i/5) + rnorm(100, sd = 0.1)
fd <- fdata(X, argvals = t)

# Compute distance based on B-spline coefficients
D <- semimetric.basis(fd, nbasis = 7)