44 lines
1.1 KiB
JavaScript
44 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.variance');
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require('../env.js');
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suite.addBatch({
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'variance': {
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'topic': function() {
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return jStat;
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},
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'return basic variance': function(jStat) {
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assert.equal(jStat.variance([1, 2, 3, 4]), 1.25);
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},
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'return basic variance using sample': function(jStat) {
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assert.equal(jStat.variance([1, 2, 3, 4, 5], true), 2.5);
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},
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'variance from instance': function(jStat) {
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assert.equal(jStat([1, 2, 3, 4]).variance(), 1.25);
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},
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'variance matrix cols': function(jStat) {
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assert.deepEqual(jStat([[1, 2], [3, 4]]).variance(), [1, 1]);
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}
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},
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'#variance vector': {
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'topic': function() {
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jStat([1, 2, 3, 4]).variance(this.callback);
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},
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'variance callback': function(val, stat) {
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assert.equal(val, 1.25);
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}
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},
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'#variance matrix cols': {
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'topic': function() {
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jStat([[1, 2], [3, 4]]).variance(this.callback);
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},
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'variance matrix cols callback': function(val, stat) {
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assert.deepEqual(val, [1, 1]);
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}
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}
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});
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suite.export(module);
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