@stdlib/ndarray-base-remove-singleton-dimensions N

removeSingletonDimensions

Remove singleton dimensions.

Installation

npm install @stdlib/ndarray-base-remove-singleton-dimensions

Usage

var removeSingletonDimensions = require( '@stdlib/ndarray-base-remove-singleton-dimensions' );

removeSingletonDimensions( x )

Returns an ndarray without singleton dimensions (i.e., dimensions whose size is equal to 1).

var array = require( '@stdlib/ndarray-array' );

// Create a 1x2x2 ndarray:
var x = array( [ [ [ 1, 2 ], [ 3, 4 ] ] ] );
// returns <ndarray>

// Remove singleton dimensions:
var y = removeSingletonDimensions( x );
// returns <ndarray>

var sh = y.shape;
// returns [ 2, 2 ]

Notes

If a provided ndarray does not have any singleton dimensions, the function returns the provided ndarray unchanged.
If a provided ndarray does have singleton dimensions, the function returns a new ndarray view.

Examples

var array = require( '@stdlib/ndarray-array' );
var numel = require( '@stdlib/ndarray-base-numel' );
var ind2sub = require( '@stdlib/ndarray-ind2sub' );
var removeSingletonDimensions = require( '@stdlib/ndarray-base-remove-singleton-dimensions' );

// Create a 5-dimensional array:
var x = array( [ [ 1, 2 ], [ 3, 4 ] ], {
    'ndmin': 5
});
// returns <ndarray>

// Remove singleton dimensions:
var y = removeSingletonDimensions( x );
// returns <ndarray>

// Retrieve the shape:
var sh = y.shape;
// returns [ 2, 2 ]

// Retrieve the number of elements:
var N = numel( sh );

// Loop through the array elements...
var i;
for ( i = 0; i < N; i++ ) {
    console.log( 'Y[%s] = %d', ind2sub( sh, i ).join( ', ' ), y.iget( i ) );
}

Notice

This package is part of 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, see the main project repository.