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Create an iterator which iteratively computes a cumulative harmonic mean.
The harmonic mean of positive real numbers x_0, x_1, ..., x_{n-1}
is defined as
To use in Observable,
itercuhmean = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/stats-iter-cuhmean@umd/browser.js' )
To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:
var itercuhmean = require( 'path/to/vendor/umd/stats-iter-cuhmean/index.js' )
To include the bundle in a webpage,
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/stats-iter-cuhmean@umd/browser.js"></script>
If no recognized module system is present, access bundle contents via the global scope:
<script type="text/javascript">
(function () {
window.itercuhmean;
})();
</script>
Returns an iterator which iteratively computes a cumulative harmonic mean.
var array2iterator = require( '@stdlib/array-to-iterator' );
var arr = array2iterator( [ 2.0, 1.0, 3.0, 7.0, 5.0 ] );
var it = itercuhmean( arr );
var v = it.next().value;
// returns 2.0
v = it.next().value;
// returns ~1.33
v = it.next().value;
// returns ~1.64
v = it.next().value;
// returns ~2.02
v = it.next().value;
// returns ~2.30
- If an iterated value is non-numeric (including
NaN
), the function returnsNaN
for all future iterations. If non-numeric iterated values are possible, you are advised to provide aniterator
which type checks and handles such values accordingly.
<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/random-iter-uniform@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/stats-iter-cuhmean@umd/browser.js"></script>
<script type="text/javascript">
(function () {
// Create an iterator for generating uniformly distributed pseudorandom numbers:
var rand = runif( 0.0, 10.0, {
'seed': 1234,
'iter': 100
});
// Create an iterator for iteratively computing a cumulative harmonic mean:
var it = itercuhmean( rand );
// Perform manual iteration...
var v;
while ( true ) {
v = it.next();
if ( typeof v.value === 'number' ) {
console.log( 'hmean: %d', v.value );
}
if ( v.done ) {
break;
}
}
})();
</script>
</body>
</html>
@stdlib/stats-iter/cugmean
: create an iterator which iteratively computes a cumulative geometric mean.@stdlib/stats-iter/cumean
: create an iterator which iteratively computes a cumulative arithmetic mean.
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.
See LICENSE.
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