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F distribution constructor.
import F from 'https://cdn.jsdelivr.net/gh/stdlib-js/stats-base-dists-f-ctor@deno/mod.js';
Returns a F distribution object.
var f = new F();
var mu = f.mean;
// returns NaN
By default, d1 = 1.0
and d2 = 1.0
. To create a distribution having a different d1
(numerator degrees of freedom) and d2
(denominator degrees of freedom), provide the corresponding arguments.
var f = new F( 2.0, 4.0 );
var mu = f.mean;
// returns 2.0
A F distribution object has the following properties and methods...
Numerator degrees of freedom of the distribution. d1
must be a positive number.
var f = new F();
var d1 = f.d1;
// returns 1.0
f.d1 = 3.0;
d1 = f.d1;
// returns 3.0
Denominator degrees of freedom of the distribution. d2
must be a positive number.
var f = new F( 2.0, 4.0 );
var d2 = f.d2;
// returns 4.0
f.d2 = 3.0;
d2 = f.d2;
// returns 3.0
Returns the differential entropy.
var f = new F( 4.0, 12.0 );
var entropy = f.entropy;
// returns ~1.12
Returns the excess kurtosis.
var f = new F( 4.0, 12.0 );
var kurtosis = f.kurtosis;
// returns ~26.143
Returns the expected value.
var f = new F( 4.0, 12.0 );
var mu = f.mean;
// returns 1.2
Returns the mode.
var f = new F( 4.0, 12.0 );
var mode = f.mode;
// returns ~0.429
Returns the skewness.
var f = new F( 4.0, 12.0 );
var skewness = f.skewness;
// returns ~3.207
Returns the standard deviation.
var f = new F( 4.0, 12.0 );
var s = f.stdev;
// returns ~1.122
Returns the variance.
var f = new F( 4.0, 12.0 );
var s2 = f.variance;
// returns 1.26
Evaluates the cumulative distribution function (CDF).
var f = new F( 2.0, 4.0 );
var y = f.cdf( 0.5 );
// returns ~0.36
Evaluates the probability density function (PDF).
var f = new F( 2.0, 4.0 );
var y = f.pdf( 0.8 );
// returns ~0.364
Evaluates the quantile function at probability p
.
var f = new F( 2.0, 4.0 );
var y = f.quantile( 0.5 );
// returns ~0.828
y = f.quantile( 1.9 );
// returns NaN
import F from 'https://cdn.jsdelivr.net/gh/stdlib-js/stats-base-dists-f-ctor@deno/mod.js';
var f = new F( 3.0, 5.0 );
var mu = f.mean;
// returns ~1.667
var mode = f.mode;
// returns ~0.238
var s2 = f.variance;
// returns ~11.111
var y = f.cdf( 0.8 );
// returns ~0.455
This package is part of stdlib, a standard library 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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