All files / to-transposed/lib main.js

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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 transpose = require( '@stdlib/ndarray/base/transpose' );
var emptyLike = require( '@stdlib/ndarray/base/empty-like' );
var assign = require( '@stdlib/ndarray/base/assign' );
 
 
// MAIN //
 
/**
* Returns a new ndarray containing the elements of an input ndarray but whose last two dimensions are transposed.
*
* @param {ndarray} x - input array
* @throws {Error} must provide an array with two or more dimensions
* @returns {ndarray} output ndarray
*
* @example
* var array = require( '@stdlib/ndarray/array' );
*
* var x = array( [ [ 1, 2, 3 ], [ 4, 5, 6 ] ] );
* // returns <ndarray>[ [ 1, 2, 3 ], [ 4, 5, 6 ] ]
*
* var out = toTransposed( x );
* // returns <ndarray>[ [ 1, 4 ], [ 2, 5 ], [ 3, 6 ] ]
*/
function toTransposed( x ) {
	var view;
	var out;

	// Create transposed view of the input array:
	view = transpose( x, false );

	// Create an output array:
	out = emptyLike( view );

	// Copy elements from transposed view to output array:
	assign( [ view, out ] );

	return out;
}
 
 
// EXPORTS //
 
module.exports = toTransposed;