Logspace

Generate a logarithmically spaced numeric array.

Installation

npm install @stdlib/array-logspace

Usage

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

logspace( a, b[, length] )

Generates a logarithmically spaced numeric array between 10^a and 10^b. If a length is not provided, the default output array length is 10.

var arr = logspace( 0, 2, 6 );
// returns [ 1, ~2.5, ~6.31, ~15.85, ~39.81, 100 ]

Notes

• The output array includes the values 10^a and 10^b. Beware of floating point errors, including for the first and last array elements.

Examples

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

// Default behavior:
out = logspace( 0, 3 );
console.log( out.join( '\n' ) );

// Specify length:
out = logspace( 0, 3, 100 );
console.log( out.join( '\n' ) );

// Create an array with decremented values:
out = logspace( 3, 0, 10 );
console.log( out.join( '\n' ) );

See Also

• @stdlib/array-incrspace: generate a linearly spaced numeric array using a provided increment.
• @stdlib/array-linspace: generate a linearly spaced array over a specified interval.

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

License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.