npm package: @stdlib/stats-iter-cumidrange
Description: Create an iterator which iteratively computes a cumulative mid-range.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
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# itercumidrange

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Create an [iterator][mdn-iterator-protocol] which iteratively computes a cumulative [mid-range][mid-range].

<section class="intro">

The [**mid-range**][mid-range], or **mid-extreme**, is the arithmetic mean of maximum and minimum values. Accordingly, the [mid-range][mid-range] is the midpoint of the [range][range] and a measure of central tendency.

</section>

<!-- /.intro -->

<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/stats-iter-cumidrange
```

</section>

<section class="usage">

## Usage

```javascript
var itercumidrange = require( '@stdlib/stats-iter-cumidrange' );
```

#### itercumidrange( iterator )

Returns an [iterator][mdn-iterator-protocol] which iteratively computes a cumulative [mid-range][mid-range].

```javascript
var array2iterator = require( '@stdlib/array-to-iterator' );

var arr = array2iterator( [ 2.0, 1.0, 3.0, -7.0, -5.0 ] );
var it = itercumidrange( arr );

var v = it.next().value;
// returns 2.0

v = it.next().value;
// returns 1.5

v = it.next().value;
// returns 2.0

v = it.next().value;
// returns -2.0

v = it.next().value;
// returns -2.0
```

</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">

## Notes

-   If an iterated value is non-numeric (including `NaN`), the function returns `NaN` for **all** future iterations. If non-numeric iterated values are possible, you are advised to provide an [`iterator`][mdn-iterator-protocol] which type checks and handles non-numeric values accordingly.

</section>

<!-- /.notes -->

<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var runif = require( '@stdlib/random-iter-uniform' );
var itercumidrange = require( '@stdlib/stats-iter-cumidrange' );

// Create an iterator for generating uniformly distributed pseudorandom numbers:
var rand = runif( -10.0, 10.0, {
    'seed': 1234,
    'iter': 100
});

// Create an iterator for iteratively computing a cumulative mid-range:
var it = itercumidrange( rand );

// Perform manual iteration...
var v;
while ( true ) {
    v = it.next();
    if ( typeof v.value === 'number' ) {
        console.log( 'mid-range: %d', v.value );
    }
    if ( v.done ) {
        break;
    }
}
```

</section>

<!-- /.examples -->

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<section class="references">

</section>

<!-- /.references -->

<!-- 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-iter/cumean`][@stdlib/stats/iter/cumean]</span><span class="delimiter">: </span><span class="description">create an iterator which iteratively computes a cumulative arithmetic mean.</span>
-   <span class="package-name">[`@stdlib/stats-iter/cumax`][@stdlib/stats/iter/cumax]</span><span class="delimiter">: </span><span class="description">create an iterator which iteratively computes a cumulative maximum value.</span>
-   <span class="package-name">[`@stdlib/stats-iter/cumin`][@stdlib/stats/iter/cumin]</span><span class="delimiter">: </span><span class="description">create an iterator which iteratively computes a cumulative minimum value.</span>
-   <span class="package-name">[`@stdlib/stats-iter/curange`][@stdlib/stats/iter/curange]</span><span class="delimiter">: </span><span class="description">create an iterator which iteratively computes a cumulative range.</span>
-   <span class="package-name">[`@stdlib/stats-iter/midrange`][@stdlib/stats/iter/midrange]</span><span class="delimiter">: </span><span class="description">compute the mid-range of all iterated values.</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

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

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

</section>

<!-- /.stdlib -->

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[npm-url]: https://npmjs.org/package/@stdlib/stats-iter-cumidrange

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[stdlib]: https://github.com/stdlib-js/stdlib

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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/stats-iter-cumidrange/tree/deno
[deno-readme]: https://github.com/stdlib-js/stats-iter-cumidrange/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/stats-iter-cumidrange/tree/umd
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[esm-url]: https://github.com/stdlib-js/stats-iter-cumidrange/tree/esm
[esm-readme]: https://github.com/stdlib-js/stats-iter-cumidrange/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/stats-iter-cumidrange/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/stats-iter-cumidrange/main/LICENSE

[range]: https://en.wikipedia.org/wiki/Range_%28statistics%29

[mid-range]: https://en.wikipedia.org/wiki/Mid-range

[mdn-iterator-protocol]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#The_iterator_protocol

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

[@stdlib/stats/iter/cumean]: https://www.npmjs.com/package/@stdlib/stats-iter-cumean

[@stdlib/stats/iter/cumax]: https://www.npmjs.com/package/@stdlib/stats-iter-cumax

[@stdlib/stats/iter/cumin]: https://www.npmjs.com/package/@stdlib/stats-iter-cumin

[@stdlib/stats/iter/curange]: https://www.npmjs.com/package/@stdlib/stats-iter-curange

[@stdlib/stats/iter/midrange]: https://www.npmjs.com/package/@stdlib/stats-iter-midrange

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</section>

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