@stdlib/ndarray-zeros-like NPM

zerosLike

Create a zero-filled ndarray having the same shape and data type as a provided ndarray.

Installation

npm install @stdlib/ndarray-zeros-like

Usage

var zerosLike = require( '@stdlib/ndarray-zeros-like' );

zerosLike( x[, options] )

Creates a zero-filled ndarray having the same shape and data type as a provided ndarray.

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

var x = zeros( [ 2, 2 ] );
// returns <ndarray>

var y = zerosLike( x );
// returns <ndarray>

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

var dt = y.dtype;
// returns 'float64'

The function supports the following options:

dtype: output ndarray data type. Must be a numeric data type or "generic". Overrides the input ndarray's inferred data type.
shape: output ndarray shape. Overrides the input ndarray's inferred shape.
order: specifies whether the output ndarray should be 'row-major' (C-style) or 'column-major' (Fortran-style). Overrides the input ndarray's inferred order.
mode: specifies how to handle indices which exceed array dimensions (see ndarray). Default: 'throw'.
submode: a mode array which specifies for each dimension how to handle subscripts which exceed array dimensions (see ndarray). If provided fewer modes than dimensions, the constructor recycles modes using modulo arithmetic. Default: [ options.mode ].
readonly: boolean indicating whether an array should be read-only. Default: false.

To override either the dtype, shape, or order, specify the corresponding option. For example, to override the inferred data type,

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

var x = zeros( [ 2, 2 ] );
// returns <ndarray>

var dt = x.dtype;
// returns 'float64'

var y = zerosLike( x, {
    'dtype': 'int32'
});
// returns <ndarray>

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

dt = y.dtype;
// returns 'int32'

Examples

var dtypes = require( '@stdlib/ndarray-dtypes' );
var zeros = require( '@stdlib/ndarray-zeros' );
var zerosLike = require( '@stdlib/ndarray-zeros-like' );

// Get a list of data types:
var dt = dtypes( 'numeric' );

// Generate zero-filled arrays...
var x;
var y;
var i;
for ( i = 0; i < dt.length; i++ ) {
    x = zeros( [ 2, 2 ], {
        'dtype': dt[ i ]
    });
    y = zerosLike( x );
    console.log( y.data );
}

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.