knot_expand_list: Expand Matrix into Partition Lists Based on Knot Boundaries

In lgspline: Lagrangian Multiplier Smoothing Splines for Smooth Function Estimation

Expand Matrix into Partition Lists Based on Knot Boundaries

Description

Takes an input N \times p matrix of polynomial expansions and outputs a list of length K+1, isolating the rows of the input corresponding to assigned partition.

Usage

knot_expand_list(partition_codes, partition_bounds, N, mat, K)

Arguments

partition_codes	Numeric vector; values determining partition assignment for each row
partition_bounds	Numeric vector; ordered knot locations defining partition boundaries
N	Integer; number of rows in input matrix
mat	Numeric matrix; data to be partitioned
K	Integer; number of interior knots (resulting in K+1 partitions)

Value

List of length K+1, each element containing the submatrix for that partition

lgspline documentation built on May 8, 2026, 5:07 p.m.