About stdlib...
We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.
The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.
When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
Create an unsigned 8-bit integer vector (i.e., a one-dimensional ndarray).
To use in Observable,
Uint8Vector = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/ndarray-vector-uint8@umd/browser.js' )To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:
var Uint8Vector = require( 'path/to/vendor/umd/ndarray-vector-uint8/index.js' )To include the bundle in a webpage,
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/ndarray-vector-uint8@umd/browser.js"></script>If no recognized module system is present, access bundle contents via the global scope:
<script type="text/javascript">
(function () {
window.Uint8Vector;
})();
</script>Returns a one-dimensional unsigned 8-bit integer ndarray.
var numel = require( '@stdlib/ndarray-numel' );
var arr = new Uint8Vector();
// returns <ndarray>
var len = numel( arr );
// returns 0The function accepts the following options:
- order: specifies whether an ndarray is
'row-major'(C-style) or'column-major'(Fortran-style). Default:'row-major'. - mode: specifies how to handle indices which exceed array dimensions (see
ndarray). Default:'throw'. - readonly: boolean indicating whether an array should be read-only. Default:
false.
Returns a one-dimensional unsigned 8-bit integer ndarray having a specified length.
var numel = require( '@stdlib/ndarray-numel' );
var arr = new Uint8Vector( 5 );
// returns <ndarray>
var len1 = numel( arr );
// returns 5Creates a one-dimensional unsigned 8-bit integer ndarray from an array-like object or iterable.
var numel = require( '@stdlib/ndarray-numel' );
var arr = new Uint8Vector( [ 1, 2, 3 ] );
// returns <ndarray>
var len1 = numel( arr );
// returns 3Returns a one-dimensional unsigned 8-bit integer ndarray view of an ArrayBuffer.
var ArrayBuffer = require( '@stdlib/array-buffer' );
var numel = require( '@stdlib/ndarray-numel' );
var buf = new ArrayBuffer( 32 );
var arr1 = new Uint8Vector( buf );
// returns <ndarray>
var len1 = numel( arr1 );
// returns 32
var arr2 = new Uint8Vector( buf, 16 );
// returns <ndarray>
var len2 = numel( arr2 );
// returns 16
var arr3 = new Uint8Vector( buf, 16, 1 );
// returns <ndarray>
var len3 = numel( arr3 );
// returns 1<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/random-array-discrete-uniform@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/blas-ext-sum@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/ndarray-map@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/ndarray-vector-uint8@umd/browser.js"></script>
<script type="text/javascript">
(function () {
// Create a vector containing random values:
var x = new Uint8Vector( discreteUniform( 10, 0, 100 ) );
// Compute the sum:
var v = sum( x );
console.log( v.get() );
// Define a function which applies a threshold to individual values:
function threshold( v ) {
return ( v > 10 ) ? v : 0;
}
// Apply threshold:
var y = map( x, threshold );
// Recompute the sum:
v = sum( y );
console.log( v.get() );
})();
</script>
</body>
</html>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.
Copyright © 2016-2025. The Stdlib Authors.
