98 lines
2.3 KiB
JavaScript
98 lines
2.3 KiB
JavaScript
// function randn_bm() {
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// var u = 0, v = 0;
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// while(u === 0) u = Math.random(); //Converting [0,1) to (0,1)
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// while(v === 0) v = Math.random();
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// return (Math.sqrt( -2.0 * Math.log( u ) ) * Math.cos( 2.0 * Math.PI * v )); // still multiply with 10%
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// }
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var spareRandom = null;
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function normalRandom()
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{
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var val, u, v, s, mul;
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if(spareRandom !== null)
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{
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val = spareRandom;
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spareRandom = null;
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}
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else
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{
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do
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{
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u = Math.random()*2-1;
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v = Math.random()*2-1;
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s = u*u+v*v;
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} while(s === 0 || s >= 1);
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mul = Math.sqrt(-2 * Math.log(s) / s);
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val = u * mul;
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spareRandom = v * mul;
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}
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return val / 14; // 7 standard deviations on either side
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}
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function normalRandomInRange(min, max)
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{
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var val;
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do
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{
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val = normalRandom();
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} while(val < min || val > max);
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return val;
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}
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function promiseGenerator({id, timeout}) {
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return new Promise((resolve, reject) => {
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setTimeout(() => {
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if (jsPsych.data.getURLVariable('debug') === 'true') {
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$('.debug').html(id + ' visible after ' + timeout + 'ms.');
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};
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if (id === '.test') {
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$(id).css({'display': 'block'});
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} else {
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$(id).css({'visibility': 'visible'});
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};
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resolve();
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}, timeout);
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// console.log(id + " at " + timeout);
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})
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}
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function promiseGenerator_display({id, timeout}) {
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return new Promise((resolve, reject) => {
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setTimeout(() => {
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if (jsPsych.data.getURLVariable('debug') === 'true') {
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$('.debug').html(id + ' visible after ' + timeout + 'ms.');
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};
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$(id).css({'display': 'block'});
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resolve();
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}, timeout);
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// console.log(id + " at " + timeout);
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})
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}
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function estBetaParams(mu, sigma) {
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// console.log("b_mu = "+mu+", b_sigma = "+sigma);
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variance = Math.pow(sigma, 2);
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alpha = ((1 - mu) / variance - 1 / mu) * Math.pow(mu,2);
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beta = alpha * (1 / mu - 1);
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return {
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a: alpha,
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b: beta
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};
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}
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function betaRandomInRange(min, max) {
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var betaparams = estBetaParams(0.9, 0.1);
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var random_num = jStat.beta.sample(betaparams.a, betaparams.b);
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// console.log("random_number -> "+random_num);
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var out = min + random_num*(max-min);
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// console.log("out -> "+Math.round(out)+" (min: "+min+", max: "+max+")");
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return Math.round(out);
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}
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