Anymatrix is a MATLAB toolbox that provides an extensible collection of
matrices, organized in groups, with the ability to search the collection by
Currently, the built-in collection contains matrices organized into 7 groups:
- contest - the CONTEST test matrix toolbox of random matrices from networks.
- core - miscellaneous matrices.
- gallery - matrices from the MATLAB gallery.
- hadamard - a large collection of Hadamard matrices.
- matlab - other MATLAB matrices (not in gallery).
- nessie - matrices from real-life networks.
- regtools - matrices from regularization problems.
The following matrices have been added since v1.0.
- Hadamard matrix of Edelman and Friedman: anymatrix('hadamard/hadamard',16,9)
Clone the repository and add the root directory anymatrix/ to the MATLAB search path.
List the groups in the collection.
G = anymatrix('groups')
Show matrices in the core group.
M = anymatrix('groups', 'core')
Show help of a beta matrix in the core group.
Show properties appended to the beta matrix.
P = anymatrix('properties', 'core/beta')
Generate the 10-by-10 beta matrix.
[A, R] = anymatrix('core/beta', 10)
Start by listing all the supported properties by the
P = anymatrix('properties')
Search for matrices that do not have a property 'symmetric'.
M = anymatrix('properties', 'not symmetric')
Look for matrices that are tridiagonal and not positive, or tridiagonal and symmetric.
M = anymatrix('properties', 'tridiagonal and (symmetric or not positive)')
Look for matrices that mention ' zero ' in their help comments.
M = anymatrix('lookfor', ' zero ')
For invocations that use only character vectors or strings, the MATLAB command form of invocation (as opposed to the functional form) can be used:
anymatrix help core/beta
Commands can be abbreviated to the first one or two letters that uniquely specify them:
anymatrix p core/beta
List all the available commands and shorthand aliases of commands.
The following groups are available for downloading into Anymatrix.
HPL-AI-Matrix: matrix designed for use in the HPL-AI Benchmark.
matrices-correlation-invalid: collection of invalid correlation matrices.
matrices-mp-cosm: collection of matrices for testing the matrix cosine.
randsvdfast-matlab: provides functionality similar to anymatrix('gallery/randsvd') but uses a faster algorithm.
The examples/ directory contains codes that illustrate how to run tests over subsets of the matrices in Anymatrix.
MATLAB 2020b or newer is required.
Nicholas J. Higham and Mantas Mikaitis. Anymatrix: An Extendable MATLAB Matrix Collection, Users' Guide. MIMS EPrint 2021.15, Manchester Institute for Mathematical Sciences, The University of Manchester, UK. Oct. 2021.
Nicholas J. Higham and Mantas Mikaitis. Anymatrix: An Extendable MATLAB Matrix Collection. Numer. Algorithms, 2021.
The code is distributed under the terms of the BSD 2-Clause License; see license.txt.
Bib citations: https://github.com/mmikaitis/anymatrix/blob/master/citation.bib
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