absdiff.js (1337B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2020 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 // MODULES // 22 23 var Float64Array = require( '@stdlib/array/float64' ); 24 var abs = require( '@stdlib/math/base/special/abs' ); 25 26 27 // MAIN // 28 29 /** 30 * Computes an element-wise absolute difference of two matrices and stores the results in a typed array. 31 * 32 * @param {Matrix} x - first input matrix 33 * @param {Matrix} y - second input matrix 34 * @returns {Float64Array} output array 35 */ 36 function absdiff( x, y ) { 37 var out; 38 var i; 39 var j; 40 var M; 41 var N; 42 43 out = new Float64Array( x.length ); 44 M = x.shape[ 0 ]; 45 N = x.shape[ 1 ]; 46 for ( i = 0; i < M; i++ ) { 47 for ( j = 0; j < N; j++ ) { 48 out[ ( i*M ) + j ] = abs( x.get( i, j ) - y.get( i, j ) ); 49 } 50 } 51 return out; 52 } 53 54 55 // EXPORTS // 56 57 module.exports = absdiff;