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incrspace
Generate a linearly spaced numeric array according to a provided increment.
Installation
npm install @stdlib/array-base-incrspace
Usage
var incrspace = require( '@stdlib/array-base-incrspace' );
incrspace( start, stop, increment )
Generates a linearly spaced numeric array
according to a provided increment
.
var arr = incrspace( 0, 11, 2 );
// returns [ 0, 2, 4, 6, 8, 10 ]
Notes
-
The output
array
is guaranteed to include thestart
value but does not include thestop
value. Beware that values subsequent to thestart
value are subject to floating-point errors. Hence,var arr = incrspace( 0.1, 0.5, 0.2 ); // returns [ 0.1, ~0.3 ]
where
arr[1]
is only guaranteed to be approximately equal to0.3
.If you desire more control over element precision, consider using roundn:
var roundn = require( '@stdlib/math-base-special-roundn' ); // Create an array subject to floating-point errors: var arr = incrspace( 0, 1.01, 0.02 ); // Round each value to the nearest hundredth: var i; for ( i = 0; i < arr.length; i++ ) { arr[ i ] = roundn( arr[ i ], -2 ); } console.log( arr.join( '\n' ) );
Examples
var incrspace = require( '@stdlib/array-base-incrspace' );
var out = incrspace( 0, 10, 2 );
console.log( out.join( '\n' ) );
out = incrspace( 0, 11, 2 );
console.log( out.join( '\n' ) );
out = incrspace( 0, 1.01, 0.02 );
console.log( out.join( '\n' ) );
// Create an array using a negative increment:
out = incrspace( 10, 0, -2 );
console.log( out.join( '\n' ) );
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.