36 lines
1.1 KiB
JavaScript
36 lines
1.1 KiB
JavaScript
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var vows = require('vows');
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var assert = require('assert');
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var suite = vows.describe('jStat.distribution');
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require('../env.js');
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suite.addBatch({
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'binomial pdf': {
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'topic': function() {
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return jStat;
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},
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//checked against R's dbinom(k, n, p)
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'check pdf calculation': function(jStat) {
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var tol = 0.0000001;
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assert.epsilon(tol, jStat.binomial.pdf(10, 25, 0.5), 0.09741664);
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assert.epsilon(tol, jStat.binomial.pdf(50, 1000, 0.05), 0.05778798);
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},
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//Checked against r's pbinom(k, n, p)
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'check cdf calculation': function(jStat) {
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var tol = 0.0000001;
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assert.epsilon(tol, jStat.binomial.cdf(10, 25, 0.5), 0.2121781);
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assert.epsilon(tol, jStat.binomial.cdf(50, 1000, 0.05), 0.537529);
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assert.ok(Number.isNaN(jStat.binomial.cdf(10, 12, -1)));
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assert.ok(Number.isNaN(jStat.binomial.cdf(10, 12, 2)));
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assert.equal(jStat.binomial.cdf(12, 10, 0.5), 1);
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assert.equal(jStat.binomial.cdf(12, -1, 0.5), 1);
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assert.epsilon(tol,
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jStat.binomial.cdf(101073, 101184, 0.9988219676207195),
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0.7857313651);
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}
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}
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});
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suite.export(module);
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