time-to-botec/squiggle/node_modules/@stdlib/stats/base/dists/lognormal

Lognormal

Lognormal distribution.

Usage

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

lognormal

Lognormal distribution.

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

The namespace contains the following distribution functions:

• cdf( x, mu, sigma ): lognormal distribution cumulative distribution function.
• logpdf( x, mu, sigma ): evaluate the natural logarithm of the probability density function (PDF) for a lognormal distribution.
• pdf( x, mu, sigma ): lognormal distribution probability density function (PDF).
• quantile( p, mu, sigma ): lognormal distribution quantile function.

The namespace contains the following functions for calculating distribution properties:

• entropy( mu, sigma ): lognormal distribution differential entropy.
• kurtosis( mu, sigma ): lognormal distribution excess kurtosis.
• mean( mu, sigma ): lognormal distribution expected value.
• median( mu, sigma ): lognormal distribution median.
• mode( mu, sigma ): lognormal distribution mode.
• skewness( mu, sigma ): lognormal distribution skewness.
• stdev( mu, sigma ): lognormal distribution standard deviation.
• variance( mu, sigma ): lognormal distribution variance.

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

• LogNormal( [mu, sigma] ): lognormal distribution constructor.

var LogNormal = require( '@stdlib/stats/base/dists/lognormal' ).LogNormal;

var dist = new LogNormal( 2.0, 4.0 );

var y = dist.cdf( 0.5 );
// returns ~0.25

Examples

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

console.log( objectKeys( lognormal ) );