32 lines
923 B
JavaScript
32 lines
923 B
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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'normal 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 dnorm(x, mean, sd)
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'check pdf calculation': function(jStat) {
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var tol = 0.000001;
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assert.epsilon(tol, jStat.normal.pdf(0, 0, 1.0), 0.3989423);
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assert.epsilon(tol, jStat.normal.pdf(5, 10, 3.0), 0.03315905);
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assert.epsilon(tol, jStat.normal.pdf(-1, 1, 0.5), 0.00026766);
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},
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//Checked against R's qnorm(p, mean, sd)
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'check inv calculation': function(jStat) {
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var tol = 0.000001;
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assert.epsilon(tol, jStat.normal.inv(0.3989423, 0, 1.0), -0.2560858);
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assert.epsilon(tol, jStat.normal.inv(0.05, 10, 3.0), 5.065439);
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assert.epsilon(tol, jStat.normal.inv(0.65, -2, .5), -1.80734);
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}
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}
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});
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suite.export(module);
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