Broadcast a scalar value to an ndarray having a specified shape.
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> Broadcast a scalar value to an [ndarray][@stdlib/ndarray/base/ctor] having a specified shape.
``bash`
npm install @stdlib/ndarray-base-broadcast-scalar
`javascript`
var broadcastScalar = require( '@stdlib/ndarray-base-broadcast-scalar' );
#### broadcastScalar( value, dtype, shape, order )
Broadcasts a scalar value to an [ndarray][@stdlib/ndarray/base/ctor] having a specified shape and [data type][@stdlib/ndarray/dtypes].
`javascript
var getShape = require( '@stdlib/ndarray-shape' );
var getDType = require( '@stdlib/ndarray-dtype' );
var x = broadcastScalar( 1.0, 'float64', [ 2, 2 ], 'row-major' );
// returns
var sh = getShape( x );
// returns [ 2, 2 ]
var dt = getDType( x );
// returns 'float64'
var v = x.get( 0, 0 );
// returns 1.0
`
- If value is a number and [dtype][@stdlib/ndarray/dtypes] is a complex [data type][@stdlib/ndarray/dtypes], the function returns an [ndarray][@stdlib/ndarray/base/ctor] containing a complex number whose real component equals the provided scalar value and whose imaginary component is zero.
- The returned [ndarray][@stdlib/ndarray/base/ctor] is a view on an [ndarray][@stdlib/ndarray/base/ctor] data buffer containing a single element. The view is not contiguous. As more than one element of a returned view may refer to the same memory location, writing to the view may affect multiple elements. If you need to write to the returned [ndarray][@stdlib/ndarray/base/ctor], copy the [ndarray][@stdlib/ndarray/base/ctor] before performing operations which may mutate elements.
- The returned [ndarray][@stdlib/ndarray/base/ctor] is a "base" [ndarray][@stdlib/ndarray/base/ctor], and, thus, the returned [ndarray][@stdlib/ndarray/base/ctor] does not perform bounds checking or afford any of the guarantees of the non-base [ndarray][@stdlib/ndarray/ctor] constructor. The primary intent of this function is to broadcast a scalar value as an [ndarray][@stdlib/ndarray/base/ctor] within internal implementations and to do so with minimal overhead.
`javascript
var dtypes = require( '@stdlib/ndarray-dtypes' );
var broadcastScalar = require( '@stdlib/ndarray-base-broadcast-scalar' );
// Get a list of data types:
var dt = dtypes( 'integer_and_generic' );
// Generate two-dimensional arrays...
var x;
var i;
for ( i = 0; i < dt.length; i++ ) {
x = broadcastScalar( i, dt[ i ], [ 2, 2 ], 'row-major' );
console.log( x.get( 0, 1 ) );
}
`
*
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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