55 lines
1.5 KiB
JavaScript
55 lines
1.5 KiB
JavaScript
/**
|
|
* @license Apache-2.0
|
|
*
|
|
* Copyright (c) 2020 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 dnanvariancepn = require( './../../../base/dnanvariancepn' );
|
|
var sqrt = require( '@stdlib/math/base/special/sqrt' );
|
|
|
|
|
|
// MAIN //
|
|
|
|
/**
|
|
* Computes the standard deviation of a double-precision floating-point strided array ignoring `NaN` values and using a two-pass algorithm.
|
|
*
|
|
* @param {PositiveInteger} N - number of indexed elements
|
|
* @param {number} correction - degrees of freedom adjustment
|
|
* @param {Float64Array} x - input array
|
|
* @param {integer} stride - stride length
|
|
* @returns {number} standard deviation
|
|
*
|
|
* @example
|
|
* var Float64Array = require( '@stdlib/array/float64' );
|
|
*
|
|
* var x = new Float64Array( [ 1.0, -2.0, NaN, 2.0 ] );
|
|
* var N = x.length;
|
|
*
|
|
* var v = dnanstdevpn( N, 1, x, 1 );
|
|
* // returns ~2.0817
|
|
*/
|
|
function dnanstdevpn( N, correction, x, stride ) {
|
|
return sqrt( dnanvariancepn( N, correction, x, stride ) );
|
|
}
|
|
|
|
|
|
// EXPORTS //
|
|
|
|
module.exports = dnanstdevpn;
|