All files / base/drrss/lib drrss.js

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/**
* @license Apache-2.0
*
* Copyright (c) 2025 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
 
'use strict';
 
// MODULES //
 
var stride2offset = require( '@stdlib/strided/base/stride2offset' );
var ndarray = require( './ndarray.js' );
 
 
// MAIN //
 
/**
* Computes the square root of the residual sum of squares of two double-precision floating-point strided arrays.
*
* @param {PositiveInteger} N - number of indexed elements
* @param {Float64Array} x - first input array
* @param {integer} strideX - stride length of `x`
* @param {Float64Array} y - second input array
* @param {integer} strideY - stride length of `y`
* @returns {number} square root of the residual sum of squares
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
*
* var x = new Float64Array( [ 1.0, 2.0, 2.0, -7.0, -2.0, 3.0, 4.0, 2.0 ] );
* var y = new Float64Array( [ 2.0, 1.0, 2.0, 1.0, -2.0, 2.0, 3.0, 4.0 ] );
*
* var z = drrss( x.length, x, 1, y, 1 );
* // returns ~8.485
*/
function drrss( N, x, strideX, y, strideY ) {
	var ox = stride2offset( N, strideX );
	var oy = stride2offset( N, strideY );
	return ndarray( N, x, strideX, ox, y, strideY, oy );
}
 
 
// EXPORTS //
 
module.exports = drrss;