maths/maths.js

Panoply of Math Functions for NodeJS

var gamma = require('gamma');
exports.gamma = gamma;
exports.gammaln = gamma.log;
exports.loggamma = gamma.log;
var beta = function(a,b) { return (gamma(a)*gamma(b))/gamma(a+b); };
var betaln = function(a,b) { return gamma.log(a)+gamma.log(b)-gamma.log(a+b); };
beta.log = betaln;
exports.beta = beta;
exports.betaln = betaln;
var pochhammer = function(a,n) { return gamma(a+n) / gamma(a); };
var pochhammerln = function(a,n) { return gamma.log(a+n) - gamma.log(a); };
pochhammer.log = pochhammerln;
exports.pochhammer = pochhammer;
exports.pochhammerln = pochhammerln;
var bessel = require('bessel');
exports.besselj = bessel.besselj;
exports.bessely = bessel.bessely;
exports.besseli = bessel.besseli;
exports.besselk = bessel.besselk;
var frac = require('frac');
exports.frac = frac;