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

Probability Mass Function

Degenerate distribution probability mass function (PMF).

Usage

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

pmf( x, mu )

Evaluates the PMF of a degenerate distribution centered at mu.

var y = pmf( 2.0, 8.0 );
// returns 0.0

y = pmf( 8.0, 8.0 );
// returns 1.0

pmf.factory( mu )

Returns a function for evaluating the PMF of a degenerate distribution centered at mu.

var mypmf = pmf.factory( 10.0 );

var y = mypmf( 10.0 );
// returns 1.0

y = mypmf( 5.0 );
// returns 0.0

y = mypmf( 12.0 );
// returns 0.0

Examples

var randu = require( '@stdlib/random/base/randu' );
var round = require( '@stdlib/math/base/special/round' );
var pmf = require( '@stdlib/stats/base/dists/degenerate/pmf' );

var mu;
var x;
var y;
var i;

for ( i = 0; i < 100; i++ ) {
    x = round( randu()*5.0 );
    mu = round( randu()*5.0 );
    y = pmf( x, mu );
    console.log( 'x: %d, µ: %d, P(X=x;µ): %d', x, mu, y );
}