dot-build_lambda_block: Build Block-Diagonal Penalty Matrix

In lgspline: Lagrangian Multiplier Smoothing Splines for Smooth Function Estimation

Build Block-Diagonal Penalty Matrix

Description

Thin wrapper around .solver_build_lambda_block(). Keeping the local helper name preserves existing call sites in get_B() while centralizing the shared implementation in solver_utils.R.

Usage

.build_lambda_block(Lambda, K, unique_penalty_per_partition, L_partition_list)

Arguments

Lambda	Shared p \times p penalty matrix.
K	Integer; number of interior knots (K+1 partitions).
unique_penalty_per_partition	Logical; if TRUE, add L_partition_list[[k]] to the k-th diagonal block.
L_partition_list	List of partition-specific p \times p penalty matrices.

Value

A P \times P block-diagonal matrix where P = p \times (K+1).

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