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fill

Fill an input ndarray with a specified value.

Installation

npm install @stdlib/ndarray-base-fill

Alternatively,

• To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
• If you are using Deno, visit the deno branch (see README for usage intructions).
• For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

Usage

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

fill( x, value )

Fills an input ndarray with a specified value.

var Float64Array = require( '@stdlib/array-float64' );

// Create a data buffer:
var xbuf = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );

// Define the shape of the input array:
var shape = [ 3, 1, 2 ];

// Define the array strides:
var sx = [ 2, 2, 1 ];

// Define the index offset:
var ox = 0;

// Create the input ndarray-like object:
var x = {
    'dtype': 'float64',
    'data': xbuf,
    'shape': shape,
    'strides': sx,
    'offset': ox,
    'order': 'row-major'
};

fill( x, 10.0 );

console.log( x.data );
// => <Float64Array>[ 10.0, 10.0, 10.0, 10.0, 10.0, 10.0 ]

The function accepts the following arguments:

• x: array-like object containing an input ndarray.
• value: scalar value.

A provided ndarray should be an object with the following properties:

• dtype: data type.
• data: data buffer.
• shape: dimensions.
• strides: stride lengths.
• offset: index offset.
• order: specifies whether an ndarray is row-major (C-style) or column major (Fortran-style).

Notes

• If value is a number and x has a complex data type, the function fills an input ndarray with a complex number whose real component equals the provided scalar value and whose imaginary component is zero.
• The function mutates the input ndarray.

Examples

var discreteUniform = require( '@stdlib/random-base-discrete-uniform' ).factory;
var filledarrayBy = require( '@stdlib/array-filled-by' );
var ndarray2array = require( '@stdlib/ndarray-base-to-array' );
var fill = require( '@stdlib/ndarray-base-fill' );

var x = {
    'dtype': 'generic',
    'data': filledarrayBy( 10, 'generic', discreteUniform( -100, 100 ) ),
    'shape': [ 5, 2 ],
    'strides': [ 2, 1 ],
    'offset': 0,
    'order': 'row-major'
};

fill( x, 10.0 );
console.log( ndarray2array( x.data, x.shape, x.strides, x.offset, x.order ) );

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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.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.