Return a view of an input ndarray in which the order of elements along each dimension is reversed.
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> Return a view of an input ndarray in which the order of elements along each dimension is reversed.
``bash`
npm install @stdlib/ndarray-base-reverse
`javascript`
var reverse = require( '@stdlib/ndarray-base-reverse' );
#### reverse( x, writable )
Returns a view of an input ndarray in which the order of elements along each dimension is reversed.
`javascript
var ndarray = require( '@stdlib/ndarray-ctor' );
var ndarray2array = require( '@stdlib/ndarray-to-array' );
var buffer = [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ];
var shape = [ 3, 2 ];
var strides = [ 2, 1 ];
var offset = 0;
var x = ndarray( 'generic', buffer, shape, strides, offset, 'row-major' );
// returns
var sh = x.shape;
// returns [ 3, 2 ]
var arr = ndarray2array( x );
// returns [ [ 1.0, 2.0 ], [ 3.0, 4.0 ], [ 5.0, 6.0 ] ]
var y = reverse( x, false );
// returns
sh = y.shape;
// returns [ 3, 2 ]
arr = ndarray2array( y );
// returns [ [ 6.0, 5.0 ], [ 4.0, 3.0 ], [ 2.0, 1.0 ] ]
`
The function accepts the following arguments:
- x: input ndarray.
- writable: boolean indicating whether a returned ndarray should be writable.
- The writable parameter only applies to ndarray constructors supporting read-only instances.
`javascript
var array = require( '@stdlib/ndarray-array' );
var ndarray2array = require( '@stdlib/ndarray-to-array' );
var zeroTo = require( '@stdlib/array-base-zero-to' );
var reverse = require( '@stdlib/ndarray-base-reverse' );
// Create a linear ndarray buffer:
var buf = zeroTo( 16 );
// Create a one-dimensional ndarray:
var x1 = array( buf, {
'shape': [ 16 ]
});
// Reverse element order:
var y1 = reverse( x1, false );
// returns
var a1 = ndarray2array( y1 );
// returns [ 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 ]
// Create a two-dimensional ndarray:
var x2 = array( buf, {
'shape': [ 4, 4 ]
});
// Reverse element order:
var y2 = reverse( x2, false );
// returns
var a2 = ndarray2array( y2 );
// returns [ [ 15, 14, 13, 12 ], [ 11, 10, 9, 8 ], [ 7, 6, 5, 4 ], [ 3, 2, 1, 0 ] ]
// Create a three-dimensional ndarray:
var x3 = array( buf, {
'shape': [ 2, 4, 2 ]
});
// Reverse element order:
var y3 = reverse( x3, false );
// returns
var a3 = ndarray2array( y3 );
// returns [ [ [ 15, 14 ], [ 13, 12 ], [ 11, 10 ], [ 9, 8 ] ], [ [ 7, 6 ], [ 5, 4 ], [ 3, 2 ], [ 1, 0 ] ] ]
`
*
This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].
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