30 lines
742 B
JavaScript
30 lines
742 B
JavaScript
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var test = require('tape');
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var ss = require('../');
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function rnd(x) {
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return Math.round(x * 1000) / 1000;
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}
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test('sample correlation', function(t) {
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test('can get the sample correlation of identical arrays', function(t) {
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var data = [1, 2, 3, 4, 5, 6];
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t.equal(rnd(ss.sample_correlation(data, data)), 1);
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t.end();
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});
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test('can get the sample correlation of different arrays', function(t) {
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var a = [1, 2, 3, 4, 5, 6];
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var b = [2, 2, 3, 4, 5, 60];
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t.equal(rnd(ss.sample_correlation(a, b)), 0.691);
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t.end();
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});
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test('zero-length corner case', function(t) {
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t.equal(rnd(ss.sample_correlation([], [])), 0);
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t.end();
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});
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t.end();
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});
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