25 lines
823 B
JavaScript
25 lines
823 B
JavaScript
var test = require('tape');
|
|
var ss = require('../');
|
|
|
|
test('interquartile range (iqr)', function(t) {
|
|
// Data and results from
|
|
// [Wikipedia](http://en.wikipedia.org/wiki/Quantile#Quantiles_of_a_population)
|
|
test('can get proper iqr of an even-length list', function(t) {
|
|
var even = [3, 6, 7, 8, 8, 10, 13, 15, 16, 20];
|
|
t.equal(ss.quantile(even, 0.75) - ss.quantile(even, 0.25), ss.iqr(even));
|
|
t.end();
|
|
});
|
|
|
|
test('can get proper iqr of an odd-length list', function(t) {
|
|
var odd = [3, 6, 7, 8, 8, 9, 10, 13, 15, 16, 20];
|
|
t.equal(ss.quantile(odd, 0.75) - ss.quantile(odd, 0.25), ss.iqr(odd));
|
|
t.end();
|
|
});
|
|
|
|
test('an iqr of a zero-length list produces null', function(t) {
|
|
t.equal(ss.iqr([]), null);
|
|
t.end();
|
|
});
|
|
t.end();
|
|
});
|