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# isSymmetricMatrix

> Test if a value is a [symmetric matrix][symmetric-matrix].

<section class="usage">

## Usage

```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
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```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
```

</section>

<!-- /.examples -->

<section class="links">

[symmetric-matrix]: https://en.wikipedia.org/wiki/Symmetric_matrix

</section>

<!-- /.links -->