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