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