115 lines
3.4 KiB
JavaScript
115 lines
3.4 KiB
JavaScript
/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var isPositiveInteger = require( '@stdlib/assert/is-positive-integer' );
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var isObject = require( '@stdlib/assert/is-plain-object' );
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var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
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var hasOwnProp = require( '@stdlib/assert/has-own-property' );
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var roundn = require( '@stdlib/math/base/special/roundn' );
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// MAIN //
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/**
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* Pretty-print output of test.
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*
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* @param {Object} [opts] - options object
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* @param {PositiveInteger} [opts.digits=4] - number of digits after the decimal point
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* @param {boolean} [opts.decision=true] - boolean indicating whether to print the test decision
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* @throws {TypeError} options has to be simple object
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* @throws {TypeError} must provide valid options
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* @returns {string} formatted output
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*/
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function print( opts ) { // eslint-disable-line stdlib/no-redeclare
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/* eslint-disable no-invalid-this */
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var decision;
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var dgts;
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var str;
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dgts = 4;
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decision = true;
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if ( arguments.length > 0 ) {
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if ( !isObject( opts ) ) {
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throw new TypeError( 'invalid argument. First argument must be an options object. Value: `' + opts + '`.' );
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}
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if ( hasOwnProp( opts, 'digits' ) ) {
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if ( !isPositiveInteger( opts.digits ) ) {
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throw new TypeError( 'invalid option. `digits` option must be a positive integer. Option: `' + opts.digits + '`.' );
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}
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dgts = opts.digits;
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}
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if ( hasOwnProp( opts, 'decision' ) ) {
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if ( !isBoolean( opts.decision ) ) {
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throw new TypeError( 'invalid option. `decision` option must be a boolean primitive. Option: `' + opts.decision + '`.' );
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}
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decision = opts.decision;
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}
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}
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str = '';
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str += this.method;
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str += '\n\n';
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str += 'Alternative hypothesis: ';
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str += 'True ratio in variances is ';
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switch ( this.alternative ) {
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case 'two-sided':
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default:
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str += 'not equal to ';
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break;
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case 'less':
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str += 'less than ';
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break;
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case 'greater':
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str += 'greater than ';
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break;
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}
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str += this.nullValue;
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str += '\n\n';
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str += ' pValue: ' + roundn( this.pValue, -dgts ) + '\n';
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str += ' statistic: ' + roundn( this.statistic, -dgts ) + '\n';
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str += ' variance of x: ' + roundn( this.xvar, -dgts );
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str += ' (df of x: ' + roundn( this.dfX, -dgts ) + ')\n';
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str += ' variance of y: ' + roundn( this.yvar, -dgts );
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str += ' (df of y: ' + roundn( this.dfY, -dgts ) + ')\n';
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str += ' ' + ((1.0-this.alpha)*100) + '% confidence interval: [' +
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roundn( this.ci[0], -dgts ) +
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',' +
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roundn( this.ci[1], -dgts ) +
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']';
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str += '\n\n';
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if ( decision ) {
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str += 'Test Decision: ';
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if ( this.rejected ) {
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str += 'Reject null in favor of alternative at ' + (this.alpha*100) + '% significance level';
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} else {
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str += 'Fail to reject null in favor of alternative at ' + (this.alpha*100) + '% significance level';
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}
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str += '\n';
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}
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return str;
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}
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// EXPORTS //
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module.exports = print;
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