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incrmidrange
Compute a mid-range incrementally.
The mid-range, or mid-extreme, is the arithmetic mean of maximum and minimum values. Accordingly, the mid-range is the midpoint of the range and a measure of central tendency.
Installation
npm install @stdlib/stats-incr-midrange
Alternatively,
- To load the package in a website via a
script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
- If you are using Deno, visit the
deno branch (see README for usage intructions).
- For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the
umd branch (see README).
The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.
Usage
var incrmidrange = require( '@stdlib/stats-incr-midrange' );
incrmidrange()
Returns an accumulator function which incrementally computes a mid-range.
var accumulator = incrmidrange();
accumulator( [x] )
If provided an input value x, the accumulator function returns an updated mid-range. If not provided an input value x, the accumulator function returns the current mid-range.
var accumulator = incrmidrange();
var midrange = accumulator();
midrange = accumulator( -2.0 );
midrange = accumulator( 1.0 );
midrange = accumulator( 3.0 );
midrange = accumulator();
Notes
- Input values are not type checked. If provided
NaN, the accumulated value is 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.
Examples
var randu = require( '@stdlib/random-base-randu' );
var incrmidrange = require( '@stdlib/stats-incr-midrange' );
var accumulator;
var v;
var i;
accumulator = incrmidrange();
for ( i = 0; i < 100; i++ ) {
v = randu() * 100.0;
accumulator( v );
}
console.log( accumulator() );
Notice
This package is part of 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, see the main project repository.
License
See LICENSE.
Copyright
Copyright © 2016-2026. The Stdlib Authors.
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