# triogramX

From SparseM v1.78
by Roger Koenker

##### A Design Matrix for a Triogram Problem

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.

- Keywords
- datasets

##### 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

*Documentation reproduced from package SparseM, version 1.78, License: GPL (>= 2)*

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