82 lines
2.0 KiB
JavaScript
82 lines
2.0 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 isNumericArray = require( '@stdlib/assert/is-numeric-array' );
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// MAIN //
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/**
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* Converts two arrays .
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*
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* @private
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* @param {NumericArray} x - array of x values
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* @param {NumericArray} y - array of y values
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* @throws {TypeError} first argument must be a numeric array
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* @throws {TypeError} second argument must be a numeric array
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* @throws {Error} first and second arguments must be of the same length
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* @returns {Object} object that mirrors an `ndarray`
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*
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* @example
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* var x = [ 0.6333, 0.8643, 1.0952, 1.3262, 1.5571, 1.7881, 2.019, 2.25, 2.481, 2.7119 ];
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* var y = [ -0.0468, 0.8012, 1.6492, 2.4973, 3.3454, 4.1934, 5.0415, 5.8896, 6.7376, 7.5857 ];
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* var out = ndarrayLike( x, y );
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*/
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function ndarrayLike( x, y ) {
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if ( !isNumericArray(x) ) {
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throw new TypeError( 'First argument must be a numeric array' );
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}
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if ( !isNumericArray(y) ) {
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throw new TypeError( 'Second argument must be a numeric array' );
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}
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if ( x.length !== y.length ) {
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throw new Error( 'First and second argument must be of same length' );
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}
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return {
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'get': get,
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'shape': [ x.length, 2 ]
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};
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/**
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* Gets an element of an nd-array-like object .
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*
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* @private
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* @param {number} i - row index
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* @param {number} j - column index
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* @returns {number} number stored in row i and column j
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*/
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function get( i, j ) {
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if ( j === 0 ) {
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return x[ i ];
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}
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return y[ i ];
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}
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}
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// EXPORTS //
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module.exports = ndarrayLike;
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