Test if a value is a symmetric matrix.
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> Test if a value is a [symmetric matrix][symmetric-matrix].
``bash`
npm install @stdlib/assert-is-symmetric-matrix
`javascript`
var isSymmetricMatrix = require( '@stdlib/assert-is-symmetric-matrix' );
#### isSymmetricMatrix( value )
Tests if a value is a [symmetric matrix][symmetric-matrix].
`javascript
var ndarray = require( '@stdlib/ndarray-ctor' );
var arr = ndarray( 'generic', [ 0, 1, 1, 2 ], [ 2, 2 ], [ 2, 1 ], 0, 'row-major' );
var bool = isSymmetricMatrix( arr );
// returns true
`
`javascript
var ndarray = require( '@stdlib/ndarray-ctor' );
var isSymmetricMatrix = require( '@stdlib/assert-is-symmetric-matrix' );
var arr = ndarray( 'generic', [ 0, 1, 1, 2 ], [ 2, 2 ], [ 2, 1 ], 0, 'row-major' );
var out = isSymmetricMatrix( arr );
// returns true
out = isSymmetricMatrix( [ 1, 2, 3, 4 ] );
// returns false
out = isSymmetricMatrix( {} );
// returns false
out = isSymmetricMatrix( null );
// returns false
`
*
- [@stdlib/assert-is-matrix-like][@stdlib/assert/is-matrix-like]: test if a value is a 2-dimensional ndarray-like object.
- [@stdlib/assert-is-nonsymmetric-matrix][@stdlib/assert/is-nonsymmetric-matrix]: test if a value is a non-symmetric matrix.
- [@stdlib/assert-is-square-matrix][@stdlib/assert/is-square-matrix]: test if a value is a 2-dimensional ndarray-like object having equal dimensions.
*
This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].
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---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
[deno-url]: https://github.com/stdlib-js/assert-is-symmetric-matrix/tree/deno
[deno-readme]: https://github.com/stdlib-js/assert-is-symmetric-matrix/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/assert-is-symmetric-matrix/tree/umd
[umd-readme]: https://github.com/stdlib-js/assert-is-symmetric-matrix/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/assert-is-symmetric-matrix/tree/esm
[esm-readme]: https://github.com/stdlib-js/assert-is-symmetric-matrix/blob/esm/README.md
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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-is-symmetric-matrix/main/LICENSE
[symmetric-matrix]: https://en.wikipedia.org/wiki/Symmetric_matrix
[@stdlib/assert/is-matrix-like]: https://www.npmjs.com/package/@stdlib/assert-is-matrix-like
[@stdlib/assert/is-nonsymmetric-matrix]: https://www.npmjs.com/package/@stdlib/assert-is-nonsymmetric-matrix
[@stdlib/assert/is-square-matrix]: https://www.npmjs.com/package/@stdlib/assert-is-square-matrix