44 lines
1.8 KiB
JavaScript
44 lines
1.8 KiB
JavaScript
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var vows = require('vows');
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var assert = require('assert');
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var suite = vows.describe('jStat.percentile');
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require('../env.js');
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//could be compared against MS Excel percentile function
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suite.addBatch({
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'percentile': {
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'topic': function() {
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return jStat;
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},
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'30th percentile of the list in the range': function(jStat) {
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assert.deepEqual(jStat.percentile([1, 2, 3, 4], 0.3), 1.9);
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},
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'30th percentile of the list in the range with exclusive flag true': function(jStat) {
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assert.deepEqual(jStat.percentile([1, 2, 3, 4], 0.3, true), 1.5);
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},
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'30th percentile of the list in the range, unsorted': function(jStat) {
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assert.deepEqual(jStat.percentile([3, 1, 4, 2], 0.3), 1.9);
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},
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'40th percentile of the list in the range with exclusive flag false': function(jStat) {
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assert.epsilon(0.0000001, jStat.percentile([15, 20, 35, 40, 50], 0.4, false), 29);
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},
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'40th percentile of the list in the range with exclusive flag true': function(jStat) {
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assert.epsilon(0.0000001, jStat.percentile([15, 20, 35, 40, 50], 0.4, true), 26);
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},
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'10th percentile of the list in the range with exclusive flag false': function(jStat) {
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assert.epsilon(0.0000001, jStat.percentile([15, 20, 35, 40, 50], 0.1, false), 17);
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},
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'10th percentile of the list in the range with exclusive flag true': function(jStat) {
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assert(isNaN(jStat.percentile([15, 20, 35, 40, 50], 0.1, true)));
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},
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'100th percentile of the list in the range with exclusive flag false': function(jStat) {
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assert.epsilon(0.0000001, jStat.percentile([15, 20, 35, 40, 50], 1, false), 50);
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},
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'100th percentile of the list in the range with exclusive flag true': function(jStat) {
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assert(isNaN(jStat.percentile([15, 20, 35, 40, 50], 1, true)));
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}
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}
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});
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suite.export(module);
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