time-to-botec/squiggle/node_modules/@stdlib/stats/base/dists/betaprime/README.md

Beta Prime

Beta prime distribution.

Usage

var betaprime = require( '@stdlib/stats/base/dists/betaprime' );

betaprime

Beta prime distribution.

var dist = betaprime;
// returns {...}

The namespace contains the following distribution functions:

• cdf( x, alpha, beta ): beta prime distribution cumulative distribution function.
• logcdf( x, alpha, beta ): evaluate the natural logarithm of the cumulative distribution function for a beta prime distribution .
• logpdf( x, alpha, beta ): beta prime distribution logarithm of probability density function (PDF).
• pdf( x, alpha, beta ): beta prime distribution probability density function (PDF).
• quantile( p, alpha, beta ): beta prime distribution quantile function.

The namespace contains the following functions for calculating distribution properties:

• kurtosis( alpha, beta ): beta prime distribution excess kurtosis.
• mean( alpha, beta ): beta prime distribution expected value.
• mode( alpha, beta ): beta prime distribution mode.
• skewness( alpha, beta ): beta prime distribution skewness.
• stdev( alpha, beta ): beta prime distribution standard deviation.
• variance( alpha, beta ): beta prime distribution variance.

The namespace contains a constructor function for creating a betaprime distribution object.

• BetaPrime( [alpha, beta] ): beta prime distribution constructor.

var BetaPrime = require( '@stdlib/stats/base/dists/betaprime' ).BetaPrime;

var dist = new BetaPrime( 2.0, 4.0 );

var mu = dist.mean;
// returns ~0.667

Examples

var objectKeys = require( '@stdlib/utils/keys' );
var betaprime = require( '@stdlib/stats/base/dists/betaprime' );

console.log( objectKeys( betaprime ) );