Compute a minimum and maximum incrementally.
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> Compute a minimum and maximum incrementally.
``bash`
npm install @stdlib/stats-incr-minmax
`javascript`
var incrminmax = require( '@stdlib/stats-incr-minmax' );
#### incrminmax( \[out] )
Returns an accumulator function which incrementally computes a minimum and maximum.
`javascript`
var accumulator = incrminmax();
By default, the returned accumulator function returns the minimum and maximum 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 = incrminmax( new Float64Array( 2 ) );
`
#### accumulator( \[x] )
If provided an input value x, the accumulator function returns updated minimum and maximum values. If not provided an input value x, the accumulator function returns the current minimum and maximum values.
`javascript
var accumulator = incrminmax();
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 [ -7.0, 3.0 ]
mm = accumulator( -5.0 );
// returns [ -7.0, 3.0 ]
mm = accumulator();
// returns [ -7.0, 3.0 ]
`
- 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.
`javascript
var randu = require( '@stdlib/random-base-randu' );
var incrminmax = require( '@stdlib/stats-incr-minmax' );
var accumulator;
var v;
var i;
// Initialize an accumulator:
accumulator = incrminmax();
// For each simulated datum, update the minimum and maximum...
for ( i = 0; i < 100; i++ ) {
v = randu() * 100.0;
accumulator( v );
}
console.log( accumulator() );
`
*
- [@stdlib/stats-incr/max][@stdlib/stats/incr/max]: compute a maximum value incrementally.
- [@stdlib/stats-incr/min][@stdlib/stats/incr/min]: compute a minimum value incrementally.
- [@stdlib/stats-incr/mminmax][@stdlib/stats/incr/mminmax]: compute a moving minimum and maximum incrementally.
- [@stdlib/stats-incr/range][@stdlib/stats/incr/range]: compute a range incrementally.
*
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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[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-incr-minmax/tree/deno
[deno-readme]: https://github.com/stdlib-js/stats-incr-minmax/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/stats-incr-minmax/tree/umd
[umd-readme]: https://github.com/stdlib-js/stats-incr-minmax/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/stats-incr-minmax/tree/esm
[esm-readme]: https://github.com/stdlib-js/stats-incr-minmax/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/stats-incr-minmax/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/stats-incr-minmax/main/LICENSE
[@stdlib/stats/incr/max]: https://www.npmjs.com/package/@stdlib/stats-incr-max
[@stdlib/stats/incr/min]: https://www.npmjs.com/package/@stdlib/stats-incr-min
[@stdlib/stats/incr/mminmax]: https://www.npmjs.com/package/@stdlib/stats-incr-mminmax
[@stdlib/stats/incr/range]: https://www.npmjs.com/package/@stdlib/stats-incr-range