boehm: Knot Insertion, Removal, and Reinsertion

In cpr: Control Polygon Reduction

Description

Functions for the insertion, removal, and reinsertion of internal knots for B-splines.

Usage

refine_ordinate(x, xi, theta, order = 4L)

coarsen_ordinate(x, xi, theta, order = 4L)

hat_ordinate(x, xi, theta, order = 4L)

insertion_matrix(x, xi, order = 4L)

Arguments

x	the value of the knot to be inserted into the knot vector
xi	the (whole) knot vector, including the repeated boundary knots. Regardless of refinement or coarsening, this vector should be the 'reduced' vector such that x will be added to it. See details and examples.
theta	the ordinates of the control polygon vertices
order	the order of the B-spline, defaults to 4 for cubic splines

Value

numeric vectors

Author(s)

Peter DeWitt [e-mail]

Examples

## Not run: 
# See the vignette
vignette("cpr-pkg", package = "cpr")

## End(Not run)

cpr documentation built on May 1, 2019, 10:46 p.m.