npm package: @stdlib/math-base-special-maxabs
Description: Return the maximum absolute value.
Author: The Stdlib Authors
Latest version: 0.3.1

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# maxabs

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> Return the maximum absolute value.

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/math-base-special-maxabs
```

</section>

<section class="usage">

## Usage

```javascript
var maxabs = require( '@stdlib/math-base-special-maxabs' );
```

#### maxabs( x, y )

Returns the maximum absolute value.

```javascript
var v = maxabs( -4.2, 3.14 );
// returns 4.2

v = maxabs( +0.0, -0.0 );
// returns +0.0
```

If any argument is `NaN`, the function returns `NaN`.

```javascript
var v = maxabs( 4.2, NaN );
// returns NaN

v = maxabs( NaN, 3.14 );
// returns NaN
```

</section>

<!-- /.usage -->

<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

</section>

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<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var uniform = require( '@stdlib/random-array-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var maxabs = require( '@stdlib/math-base-special-maxabs' );

var opts = {
    'dtype': 'float64'
};
var x = uniform( 100, -500.0, 500.0, opts );
var y = uniform( 100, -500.0, 500.0, opts );

logEachMap( 'maxabs(%0.4f,%0.4f) = %0.4f', x, y, maxabs );
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

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<section class="intro">

</section>

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<section class="usage">

### Usage

```c
#include "stdlib/math/base/special/maxabs.h"
```

#### stdlib_base_maxabs( x, y )

Returns the maximum absolute value.

```c
double out = stdlib_base_maxabs( -4.2, 3.14 );
// returns 4.2

out = stdlib_base_maxabs( 0.0, -0.0 );
// returns +0.0
```

The function accepts the following arguments:

-   **x**: `[in] double` input value.
-   **y**: `[in] double` input value.

```c
double stdlib_base_maxabs( const double x, const double y );
```

</section>

<!-- /.usage -->

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<section class="notes">

</section>

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<!-- C API usage examples. -->

<section class="examples">

### Examples

```c
#include "stdlib/math/base/special/maxabs.h"
#include <stdlib.h>
#include <stdio.h>

int main( void ) {
    double x;
    double y;
    double v;
    int i;

    for ( i = 0; i < 100; i++ ) {
        x = ( ( (double)rand() / (double)RAND_MAX ) * 1000.0 ) - 500.0;
        y = ( ( (double)rand() / (double)RAND_MAX ) * 1000.0 ) - 500.0;
        v = stdlib_base_maxabs( x, y );
        printf( "x: %lf, y: %lf, maxabs(x, y): %lf\n", x, y, v );
    }
}
```

</section>

<!-- /.examples -->

</section>

<!-- /.c -->

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</section>

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* * *

## See Also

-   <span class="package-name">[`@stdlib/math-base/special/max`][@stdlib/math/base/special/max]</span><span class="delimiter">: </span><span class="description">return the maximum value.</span>
-   <span class="package-name">[`@stdlib/math-base/special/minabs`][@stdlib/math/base/special/minabs]</span><span class="delimiter">: </span><span class="description">return the minimum absolute value.</span>

</section>

<!-- /.related -->

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<section class="main-repo" >

* * *

## Notice

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].

#### Community

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---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

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[umd]: https://github.com/umdjs/umd
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<!-- <related-links> -->

[@stdlib/math/base/special/max]: https://www.npmjs.com/package/@stdlib/math-base-special-max

[@stdlib/math/base/special/minabs]: https://www.npmjs.com/package/@stdlib/math-base-special-minabs

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