var RAND_max=10; var modd=8; var arr=[]; var elBias, elStats; var bias; var tot=0; var targetP = 0.0; // prob of selection var numeratorP; var epsilon = 0.0333; var ones=0, zeroes=0; var iv; var elCounts, elDists, elOutputs; function insertDataRows(){ var elTable = document.getElementById("output"); var topRow = document.createElement("tr"); topRow.innerHTML = "remTallyFreqOutput"; elTable.appendChild(topRow); for(var i=0; i" + by + ""; } function spanHi(by){ return "

" + by + "

"; } function spanOk(by){ return "

" + by + "

"; } function rnd(){ var r = parseInt(Math.random() * RAND_max) % modd; arr[r] += 1; tot +=1; var tmp = arr[r]/tot; if(tmp>targetP+epsilon) ones += 1; else zeroes += 1; tmp = tmp.toPrecision(5); if(tot %3 == 0) { elCounts[r].innerHTML = arr[r]; if(tmp>targetP+epsilon){ elDists[r].innerHTML = spanHi(tmp); elOutputs[r].innerHTML = 1; // biased } else if(tmptargetP+epsilon ? spanHi(tmp) : tmp0: " + zeroes + " ("+parseInt(zeroes/tot*1000)/10+"%)"; elOnes.innerHTML= "1: " + ones + " ("+parseInt(ones/tot*1000)/10+"%)"; } window.onload=function(){ var elModulus = document.getElementById("modulus"); for(var i=8; i<15; i++) { var option = document.createElement("option"); option.value=i; option.innerHTML =i; if(i==8) option.selected = true; elModulus.appendChild(option); } } function setMod(el) { modd = parseInt(el.value); } function go() { tot=0; elBias = document.getElementById("bias"); // mod(T + 1) = randmax bias = elBias.value; // TODO: voodoo RAND_max = modd*(0.87+ Number(bias)/100); numeratorP = parseInt(RAND_max/modd) targetP = numeratorP / RAND_max//).//toPrecision(6); document .getElementById('targetP') .innerHTML = targetP; workerScript = document .getElementById("worker") .innerHTML; if (typeof(Worker) === undefined) { // eval(workerScript); // capture onmessage() // set defaults for one thread } else { fillWorkerPool(3); // use just enough to minimize chat startAllWorkers(); } var body = document.getElementsByTagName("body")[0]; insertDataRows(); elStats = document.createElement("div"); elOnes = document.createElement("div"); elZeroes = document.createElement("div"); elStats.appendChild(elZeroes); elStats.appendChild(elOnes); body.appendChild(elStats); iv= setInterval(rnd, 1000/60); } var workerScript; var workerPool = new Array(); function nullAllWorkers(){ for(var workerNumber in workerPool) workerPool[workerNumber] = null; workerPool=null; } window.onerror=function(){ clearInterval(iv); nullAllWorkers(); } window.onbeforeunload=function(){ clearInterval(iv); nullAllWorkers(); } function workerListener(){ var workerTalking = workerPool[event.data.worker]; switch (event.data.msg) { case "msg": /*workerTalking.postMessage({ "cmd":"NoMoreWork" }); */ break; default: break; } } function fillWorkerPool(howMany){ return false; // wip for(var index=0; index

Modulo bias in PRNG [PoC; cleaning up]