mk.pt.constr: COBS auxiliary for constructing pointwise constraint...

In cobs: Constrained B-Splines (Sparse Matrix Based)

COBS auxiliary for constructing pointwise constraint specifications

Description

COBS (cobs) auxiliary function for constructing the pointwise constraint specification list from the pointwise 3-column matrix (as used as argument in cobs).

Usage

mk.pt.constr(pointwise)

Arguments

pointwise

numeric 3-column matrix, see pointwise in cobs.

Value

A list with components

n.equal	number of equality constraints
n.greater	number of “greater” constraints
n.smaller	number of “smaller” constraints
n.gradient	number of gradient constraints

Unless the input pointwise was NULL, the result also has corresponding components:

equal	3-column matrix ofequality constraints
greater	3-column matrix of“greater” constraints
smaller	3-column matrix of“smaller” constraints
gradient	3-column matrix ofgradient constraints

Author(s)

Martin Maechler

Examples

 ## from  ?cobs:
 x <- seq(-1,3,,150)
 con <- rbind(c( 1,min(x),0), # f(min(x)) >= 0
              c(-1,max(x),1), # f(max(x)) <= 1
              c(0,  0,   0.5))# f(0)      = 0.5
 r <- mk.pt.constr(con)
 str(r)

cobs documentation built on April 4, 2025, 1:45 a.m.