R: A Design Matrix for a Triogram Problem

triogramX {SparseM} | R Documentation

## A Design Matrix for a Triogram Problem

### Description

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.

### Usage

    data(triogramX)

### Format

A 375 by 100 matrix stored in compressed sparse row format

### References

Koenker, R and Ng, P. (2002). SparseM: A Sparse Matrix Package for R,
http://www.econ.uiuc.edu/~roger/research

[Package SparseM version 1.77 Index]