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* @license Apache-2.0
*
* Copyright (c) 2026 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 serialize = require( '@stdlib/ndarray/base/serialize-meta-data' );
var getData = require( '@stdlib/ndarray/base/data-buffer' );
var addon = require( './../src/addon.node' );
// MAIN //
/**
* Compute the variance of a one-dimensional double-precision floating-point ndarray.
*
* ## Notes
*
* - The function expects the following ndarrays:
*
* - a one-dimensional input ndarray.
* - a zero-dimensional ndarray specifying the degrees of freedom adjustment.
*
* @private
* @param {ArrayLikeObject<Object>} arrays - array-like object containing ndarrays
* @returns {number} variance
*
* @example
* var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
* var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
*
* var opts = {
* 'dtype': 'float64'
* };
*
* var x = new Float64Vector( [ 1.0, -2.0, 2.0 ] );
* var correction = scalar2ndarray( 1.0, opts );
*
* var v = dvariance( [ x, correction ] );
* // returns ~4.3333
*/
function dvariance( arrays ) {
var correction = arrays[ 1 ];
var x = arrays[ 0 ];
return addon( getData( x ), serialize( x ), getData( correction ), serialize( correction ) ); // eslint-disable-line max-len
}
// EXPORTS //
module.exports = dvariance;
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