distriprob/lib/impls/random.js

A library for calculating the PDF, CDFs, and quantile function values of common probability distributions

"use strict";
const async_1 = require("./async");
function randSync(n, quantileFctn, quantileFctnArgs, seed, randoms) {
    if (!randoms) {
        randoms = [];
        const sr = require("seedrandom");
        let rng;
        if (seed) {
            rng = sr(seed);
        }
        else {
            rng = sr();
        }
        while (randoms.length < n) {
            let rand = rng();
            if (rand !== 0) {
                randoms.push(rng());
            }
        }
    }
    const result = [];
    while (randoms.length > 0) {
        const args = [randoms.pop()].concat(quantileFctnArgs);
        result.push(quantileFctn.apply(null, args));
    }
    return result;
}
exports.randSync = randSync;
function rand(n, quantileFctn, quantileFctnParams, seed, fctnDependencies) {
    const randoms = [];
    const sr = require("seedrandom");
    let rng;
    if (seed) {
        rng = sr(seed);
    }
    else {
        rng = sr();
    }
    while (randoms.length < n) {
        let rand = rng();
        if (rand !== 0) {
            randoms.push(rng());
        }
    }
    const dependencies = [quantileFctn].concat(fctnDependencies);
    const randSyncArgs = [n, quantileFctn, quantileFctnParams, null, randoms];
    return async_1.asyncGen(dependencies, randSync, randSyncArgs);
}
exports.rand = rand;