triogramX

This is a design matrix arising from a bivariate smoothing
problem using penalized triogram fitting.  It is used in the SparseM vignette
to illustrate the use of the sparse matrix image function.

datasets

Some basic linear algebra functionality for sparse matrices is
provided:  including Cholesky decomposition and backsolving as well as
standard R subsetting and Kronecker products.

Roger Koenker

SparseM

Sparse Linear Algebra

triogramX function

A 375 by 100 matrix stored in compressed sparse row format

triogramX: A Design Matrix for a Triogram Problem

Description

Usage

Arguments

Format

References