40 lines
1.5 KiB
TypeScript
40 lines
1.5 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {describe, expect, it} from '@angular/core/testing/src/testing_internal';
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import {Statistic} from '../src/statistic';
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export function main() {
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describe('statistic', () => {
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it('should calculate the mean', () => {
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expect(Statistic.calculateMean([])).toBeNaN();
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expect(Statistic.calculateMean([1, 2, 3])).toBe(2.0);
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});
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it('should calculate the standard deviation', () => {
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expect(Statistic.calculateStandardDeviation([], NaN)).toBeNaN();
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expect(Statistic.calculateStandardDeviation([1], 1)).toBe(0.0);
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expect(Statistic.calculateStandardDeviation([2, 4, 4, 4, 5, 5, 7, 9], 5)).toBe(2.0);
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});
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it('should calculate the coefficient of variation', () => {
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expect(Statistic.calculateCoefficientOfVariation([], NaN)).toBeNaN();
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expect(Statistic.calculateCoefficientOfVariation([1], 1)).toBe(0.0);
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expect(Statistic.calculateCoefficientOfVariation([2, 4, 4, 4, 5, 5, 7, 9], 5)).toBe(40.0);
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});
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it('should calculate the regression slope', () => {
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expect(Statistic.calculateRegressionSlope([], NaN, [], NaN)).toBeNaN();
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expect(Statistic.calculateRegressionSlope([1], 1, [2], 2)).toBeNaN();
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expect(Statistic.calculateRegressionSlope([1, 2], 1.5, [2, 4], 3)).toBe(2.0);
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});
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});
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}
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