time-to-botec

Benchmark sampling in different programming languages
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ratio_array.js (1115B)

      1 /**
      2 * @license Apache-2.0
      3 *
      4 * Copyright (c) 2018 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 // MAIN //
     22 
     23 /**
     24 * Returns an array containing the ratio of each pair of consecutive elements in order: `X[ i+1 ] / X[ i ]`.
     25 *
     26 * @private
     27 * @param {NumberArray} X - input array
     28 * @returns {NumberArray} ratio array
     29 *
     30 * @example
     31 * var R = ratioArray( [ 1.0, 2.0, 5.0 ] );
     32 * // returns [ 2.0, 2.5 ]
     33 */
     34 function ratioArray( X ) {
     35 	var R;
     36 	var i;
     37 
     38 	R = [];
     39 	for ( i = 0; i < X.length-1; i++ ) {
     40 		R.push( X[ i+1 ] / X[ i ] );
     41 	}
     42 	return R;
     43 }
     44 
     45 
     46 // EXPORTS //
     47 
     48 module.exports = ratioArray;