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Generate a linearly spaced numeric array using a provided increment.
To use in Observable,
incrspace = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/array-incrspace@umd/browser.js' )To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:
var incrspace = require( 'path/to/vendor/umd/array-incrspace/index.js' )To include the bundle in a webpage,
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/array-incrspace@umd/browser.js"></script>If no recognized module system is present, access bundle contents via the global scope:
<script type="text/javascript">
(function () {
window.incrspace;
})();
</script>Generates a linearly spaced numeric array. If an increment is not provided, the default increment is 1.
var arr = incrspace( 0, 11, 2 );
// returns [ 0, 2, 4, 6, 8, 10 ]-
The output
arrayis guaranteed to include thestartvalue but does not include thestopvalue. Beware that values subsequent to thestartvalue 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' ); var arr; var out; var i; // Create an array subject to floating-point errors: arr = incrspace( 0, 1.01, 0.02 ); // Round each value to the nearest hundredth: out = []; for ( i = 0; i < arr.length; i++ ) { out.push( roundn( arr[ i ], -2 ) ); } console.log( out.join( '\n' ) );
<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/array-incrspace@umd/browser.js"></script>
<script type="text/javascript">
(function () {
var out;
// Default behavior:
console.log( '\nDefault:' );
out = incrspace( 0, 10 );
console.log( out.join( '\n' ) );
// Specify increment:
console.log( '\nIncrement 2:' );
out = incrspace( 0, 10, 2 );
console.log( out.join( '\n' ) );
console.log( '\nIncrement 2:' );
out = incrspace( 0, 11, 2 );
console.log( out.join( '\n' ) );
console.log( '\nIncrement 0.02:' );
out = incrspace( 0, 1.01, 0.02 );
console.log( out.join( '\n' ) );
// Create an array using a negative increment:
console.log( '\nDecremented values:' );
out = incrspace( 10, 0, -2 );
console.log( out.join( '\n' ) );
})();
</script>
</body>
</html>@stdlib/array-linspace: generate a linearly spaced array over a specified interval.@stdlib/array-logspace: generate a logarithmically spaced numeric array.
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.
See LICENSE.
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