Matrix Market matrix format. Used for exchanging and storing test matrices. Plain text format. File format of the NIST Matrix Market collection of standard test matrices. Stores numerical or pattern matrices in a dense ("array format") or sparse ("coordinate format") representation. Developed in 1996 by R. Boisvert, R. Pozo, K. Remington, and J. Dongarra. Maintained by the U.S. National Institute of Standards and Technology (NIST).
Import and Export fully support the Matrix Market file format.