DiffMat: Generate a difference matrix

In L0TFinv: A Splicing Approach to the Inverse Problem of L0 Trend Filtering

Generate a difference matrix

Description

This function generates a matrix for computing differences of a certain order, useful in numerical methods and for creating specific matrix patterns.

Usage

DiffMat(n, q)

Arguments

n	The number of data points
q	The order of the difference

Value

A matrix with dimensions n-q-1 by n, whose elements correspond to the combinatorial values of q.

See Also

XMat

Examples

Mat1 <- DiffMat(n = 10, q = 0)
print(Mat1)

Mat2 <- DiffMat(n = 15, q = 1)
print(Mat2)

Mat3 <- DiffMat(n = 15, q = 2)
print(Mat3)

L0TFinv documentation built on June 10, 2025, 5:14 p.m.