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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 base = require( './base.js' );
// MAIN //
/**
* Generates an M-by-N real matrix Q with orthonormal columns. The matrix Q is defined as the first N columns of a product of K elementary reflectors of order M. `Q = H(1) H(2) . . . H(K)` as returned by `dgeqrf`.
*
* @param {PositiveInteger} M - number of rows in matrix `A`
* @param {PositiveInteger} N - number of columns in matrix `A`
* @param {NonNegativeInteger} K - number of elementary reflectors whose product defines the matrix Q
* @param {Float64Array} A - input matrix
* @param {integer} strideA1 - stride of the first dimension of `A`
* @param {integer} strideA2 - stride of the second dimension of `A`
* @param {NonNegativeInteger} offsetA - index offset for `A`
* @param {Float64Array} tau - vector of K scalar factors of the elementary reflectors
* @param {integer} strideTau - stride length for `tau`
* @param {NonNegativeInteger} offsetTau - index offset for `tau`
* @param {Float64Array} work - workspace array
* @param {integer} strideWork - stride length for `work`
* @param {NonNegativeInteger} offsetWork - index offset for `work`
* @returns {Float64Array} matrix `A` overwritten with the orthogonal matrix Q
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
*
* var A = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );
* var tau = new Float64Array( [ 0.0, 0.0 ] );
* var work = new Float64Array( [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ] );
*
* dorg2r( 3, 2, 2, A, 1, 3, 0, tau, 1, 0, work, 1, 0 );
* // A => <Float64Array>[ 1.0, 0.0, 0.0, 0.0, 1.0, 0.0 ]
*/
function dorg2r( M, N, K, A, strideA1, strideA2, offsetA, tau, strideTau, offsetTau, work, strideWork, offsetWork ) { // eslint-disable-line max-len, max-params
return base( M, N, K, A, strideA1, strideA2, offsetA, tau, strideTau, offsetTau, work, strideWork, offsetWork ); // eslint-disable-line max-len
}
// EXPORTS //
module.exports = dorg2r;
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