All files / lapack/base/dgebak/lib index.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';
 
/**
* LAPACK routine to form the right or left eigenvectors of a real general matrix by backward transformation on the computed eigenvectors of the balanced matrix output by `dgebal`.
*
* @module @stdlib/lapack/base/dgebak
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var dgebak = require( '@stdlib/lapack/base/dgebak' );
*
* var scale = new Float64Array( [ 0.5, 2.0, 1.0 ] );
* var V = new Float64Array( [ 1.0, 4.0, 2.0, 5.0, 3.0, 6.0 ] );
*
* var out = dgebak( 'row-major', 'scale', 'right', 3, 0, 2, scale, 2, V, 2 );
* // returns <Float64Array>[ 0.5, 2, 4, 10, 3, 6 ]
*/
 
// MODULES //
 
var join = require( 'path' ).join;
var tryRequire = require( '@stdlib/utils/try-require' );
var isError = require( '@stdlib/assert/is-error' );
var main = require( './main.js' );
 
 
// MAIN //
 
var dgebak;
var tmp = tryRequire( join( __dirname, './native.js' ) );
if ( isError( tmp ) ) {
	dgebak = main;
} else {
	dgebak = tmp;
}
 
 
// EXPORTS //
 
module.exports = dgebak;