20 lines
509 B
JavaScript
20 lines
509 B
JavaScript
var test = require('tape');
|
|
var ss = require('../');
|
|
|
|
function rnd(x) {
|
|
return Math.round(x * 1000) / 1000;
|
|
}
|
|
|
|
test('sample_standard_deviation', function(t) {
|
|
test('can get the standard deviation of an example on wikipedia', function(t) {
|
|
t.equal(rnd(ss.sample_standard_deviation([2, 4, 4, 4, 5, 5, 7, 9])), 2.138);
|
|
t.end();
|
|
});
|
|
|
|
test('zero-length corner case', function(t) {
|
|
t.equal(rnd(ss.sample_standard_deviation([])), 0);
|
|
t.end();
|
|
});
|
|
t.end();
|
|
});
|