@stdlib/stats/incr/minmaxabs/README.md

Standard library statistical functions.

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# incrminmaxabs

> Compute minimum and maximum absolute values incrementally.

<section class="usage">

## Usage

```javascript
var incrminmaxabs = require( '@stdlib/stats/incr/minmaxabs' );
```

#### incrminmaxabs( \[out] )

Returns an accumulator `function` which incrementally computes minimum and maximum absolute values.

```javascript
var accumulator = incrminmaxabs();
```

By default, the returned accumulator `function` returns the minimum and maximum absolute values as a two-element `array`. To avoid unnecessary memory allocation, the function supports providing an output (destination) object.

```javascript
var Float64Array = require( '@stdlib/array/float64' );

var accumulator = incrminmaxabs( new Float64Array( 2 ) );
```

#### accumulator( \[x] )

If provided an input value `x`, the accumulator function returns updated minimum and maximum absolute values. If not provided an input value `x`, the accumulator function returns the current minimum and maximum absolute values.

```javascript
var accumulator = incrminmaxabs();

var mm = accumulator();
// returns null

mm = accumulator( 2.0 );
// returns [ 2.0, 2.0 ]

mm = accumulator( 1.0 );
// returns [ 1.0, 2.0 ]

mm = accumulator( 3.0 );
// returns [ 1.0, 3.0 ]

mm = accumulator( -7.0 );
// returns [ 1.0, 7.0 ]

mm = accumulator( -5.0 );
// returns [ 1.0, 7.0 ]

mm = accumulator();
// returns [ 1.0, 7.0 ]
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   Input values are **not** type checked. If provided `NaN`, the accumulated values are equal to `NaN` for **all** future invocations. If non-numeric inputs are possible, you are advised to type check and handle accordingly **before** passing the value to the accumulator function.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

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

```javascript
var randu = require( '@stdlib/random/base/randu' );
var incrminmaxabs = require( '@stdlib/stats/incr/minmaxabs' );

var accumulator;
var v;
var i;

// Initialize an accumulator:
accumulator = incrminmaxabs();

// For each simulated datum, update the minimum and maximum absolute values...
for ( i = 0; i < 100; i++ ) {
    v = ( randu()*100.0 ) - 50.0;
    accumulator( v );
}
console.log( accumulator() );
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/stats/incr/maxabs`][@stdlib/stats/incr/maxabs]</span><span class="delimiter">: </span><span class="description">compute a maximum absolute value incrementally.</span>
-   <span class="package-name">[`@stdlib/stats/incr/minabs`][@stdlib/stats/incr/minabs]</span><span class="delimiter">: </span><span class="description">compute a minimum absolute value incrementally.</span>
-   <span class="package-name">[`@stdlib/stats/incr/minmax`][@stdlib/stats/incr/minmax]</span><span class="delimiter">: </span><span class="description">compute a minimum and maximum incrementally.</span>
-   <span class="package-name">[`@stdlib/stats/incr/mminmaxabs`][@stdlib/stats/incr/mminmaxabs]</span><span class="delimiter">: </span><span class="description">compute moving minimum and maximum absolute values incrementally.</span>

</section>

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<section class="links">

<!-- <related-links> -->

[@stdlib/stats/incr/maxabs]: https://github.com/stdlib-js/stats/tree/main/incr/maxabs

[@stdlib/stats/incr/minabs]: https://github.com/stdlib-js/stats/tree/main/incr/minabs

[@stdlib/stats/incr/minmax]: https://github.com/stdlib-js/stats/tree/main/incr/minmax

[@stdlib/stats/incr/mminmaxabs]: https://github.com/stdlib-js/stats/tree/main/incr/mminmaxabs

<!-- </related-links> -->

</section>

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