math-betaln

    0.0.0 • Public • Published

    betaln

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    Natural logarithm of the Beta function.

    This function evaluates the natural logarithm of the Beta function, defined as follows:

    Natural logarithm of the beta function.

    In here, Γ denotes the Gamma function.

    Installation

    $ npm install math-betaln

    Usage

    var betaln = require( 'math-betaln' );

    betaln( x, y )

    Evaluates the natural logarithm of the Beta function.

    var val = betaln( 0, 0 );
    // returns +Infinity
     
    val = betaln( 0.001, 0.001 );
    // returns ~7.601
     
    val = betaln( -1, 2 );
    // return NaN
     
    val = betaln( 2, 1 );
    // returns ~-1.099
     
    val = betaln( 4, 1 );
    // returns ~-1.386

    Examples

    var betaln = require( 'math-betaln' );
     
    for ( var x = 0; x < 5; x++ ) {
        for ( var y = 5; y > 0; y-- ) {
            console.log( 'x: %d, \t y: %d, \t f(x,y): %d', x, y, betaln( x, y ) );
        }
    }
     

    To run the example code from the top-level application directory,

    $ node ./examples/index.js

    Tests

    Unit

    This repository uses tape for unit tests. To run the tests, execute the following command in the top-level application directory:

    $ make test

    All new feature development should have corresponding unit tests to validate correct functionality.

    Test Coverage

    This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:

    $ make test-cov

    Istanbul creates a ./reports/coverage directory. To access an HTML version of the report,

    $ make view-cov

    Browser Support

    This repository uses Testling for browser testing. To run the tests in a (headless) local web browser, execute the following command in the top-level application directory:

    $ make test-browsers

    To view the tests in a local web browser,

    $ make view-browser-tests

    License

    MIT license.

    Copyright

    Copyright © 2016. The Compute.io Authors.

    Install

    npm i math-betaln

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    0

    Version

    0.0.0

    License

    MIT

    Last publish

    Collaborators

    • planeshifter