@stdlib/ndarray-from-scalar

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scalar2ndarray

Convert a scalar value to a zero-dimensional ndarray.

Installation

npm install @stdlib/ndarray-from-scalar

Usage

var scalar2ndarray = require( '@stdlib/ndarray-from-scalar' );

scalar2ndarray( value[, options] )

Returns a zero-dimensional ndarray containing a provided scalar value.

var x = scalar2ndarray( 1.0 );
// returns <ndarray>

var sh = x.shape;
// returns []

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

var v = x.get();
// returns 1.0

The function accepts the following options:

• dtype: output array data type.
• order: array order (i.e., memory layout), which is either row-major (C-style) or column-major (Fortran-style). Default: 'row-major'.
• readonly: boolean indicating whether an array should be read-only. Default: false.

If a dtype option is not provided and value

• is a number, the default data type is the default real-valued floating-point data type.
• is a complex number object of a known data type, the data type is the same as the provided value.
• is a complex number object of an unknown data type, the default data type is the default complex-valued floating-point data type.
• is any other value type, the default data type is 'generic'.

To explicitly specify the data type of the returned ndarray, provide a dtype option.

var x = scalar2ndarray( 1.0, {
    'dtype': 'float32'
});
// returns <ndarray>

var sh = x.shape;
// returns []

var dt = x.dtype;
// returns 'float32'

var v = x.get();
// returns 1.0

Notes

• If value is a number and options.dtype is a complex data type, the function returns a zero-dimensional ndarray containing a complex number whose real component equals the provided scalar value and whose imaginary component is zero.

Examples

var dtypes = require( '@stdlib/ndarray-dtypes' );
var scalar2ndarray = require( '@stdlib/ndarray-from-scalar' );

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

// Generate zero-dimensional arrays...
var x;
var i;
for ( i = 0; i < dt.length; i++ ) {
    x = scalar2ndarray( i, {
        'dtype': dt[ i ]
    });
    console.log( x.get() );
}

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See Also

• @stdlib/ndarray-array: multidimensional arrays.
• @stdlib/ndarray-ctor: multidimensional array constructor.

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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

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