time-to-botec

Benchmark sampling in different programming languages
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variance-test.js (1141B)

      1 var vows = require('vows');
      2 var assert = require('assert');
      3 var suite = vows.describe('jStat.variance');
      4 
      5 require('../env.js');
      6 
      7 suite.addBatch({
      8   'variance': {
      9     'topic': function() {
     10       return jStat;
     11     },
     12     'return basic variance': function(jStat) {
     13       assert.equal(jStat.variance([1, 2, 3, 4]), 1.25);
     14     },
     15     'return basic variance using sample': function(jStat) {
     16       assert.equal(jStat.variance([1, 2, 3, 4, 5], true), 2.5);
     17     },
     18     'variance from instance': function(jStat) {
     19       assert.equal(jStat([1, 2, 3, 4]).variance(), 1.25);
     20     },
     21     'variance matrix cols': function(jStat) {
     22       assert.deepEqual(jStat([[1, 2], [3, 4]]).variance(), [1, 1]);
     23     }
     24   },
     25   '#variance vector': {
     26     'topic': function() {
     27       jStat([1, 2, 3, 4]).variance(this.callback);
     28     },
     29     'variance callback': function(val, stat) {
     30       assert.equal(val, 1.25);
     31     }
     32   },
     33   '#variance matrix cols': {
     34     'topic': function() {
     35       jStat([[1, 2], [3, 4]]).variance(this.callback);
     36     },
     37     'variance matrix cols callback': function(val, stat) {
     38       assert.deepEqual(val, [1, 1]);
     39     }
     40   }
     41 });
     42 
     43 suite.export(module);