@stdlib/stdlib
TypeScript icon, indicating that this package has built-in type declarations

0.2.0 • Public • Published


stdlib logo




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 (/ˈstændərd lɪb/ "standard lib") 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 provides a collection of robust, high performance libraries for mathematics, statistics, data processing, streams, and more and includes many of the utilities you would expect from a standard library.

What sets stdlib apart is its fully decomposable architecture, allowing you to 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.

Want to join us in bringing numerical computing to the web? Start by starring the project. 🌟

Explore this GitHub repository for stdlib's source code and documentation. For help developing stdlib, see the development guide.

Thank you for being a part of our community! Your support is invaluable to us!

Resources

External Resources

Features

  • 150+ special math functions.

    Demo showcasing special math functions
  • 35+ probability distributions, with support for evaluating probability density functions (PDFs), cumulative distribution functions (CDFs), quantiles, moments, and more.

    Demo showcasing probability distributions
  • 40+ seedable pseudorandom number generators (PRNGs).

    Demo showcasing PRNGs
  • 200+ general utilities for data transformation, functional programming, and asynchronous control flow.

    Demo showcasing general utilities
  • 200+ assertion utilities for data validation and feature detection.

    Demo showcasing assertion utilities
  • 50+ sample datasets for testing and development.

    Demo showcasing sample datasets
  • A plot API for data visualization and exploratory data analysis.

    Demo showcasing plot API
  • Native add-ons for interfacing with BLAS libraries, with pure JavaScript fallbacks.

    Demo showcasing BLAS APIs
  • A benchmark framework supporting TAP.

    Demo showcasing benchmark framework
  • REPL environment with integrated help and examples.

    Demo showcasing REPL environment
  • Can be bundled using Browserify, Webpack, and other bundlers for use in web browsers.

    Demo showcasing browser support
  • Every function is accompanied by TypeScript declaration files, ensuring type safety and facilitating intelligent code completion in IDEs.

    Demo showcasing TypeScript declaration files

Installation

To accommodate various use cases, stdlib can be consumed in multiple ways. The preferred means of consumption depends on your individual use case. We've provided some user stories to help you identify the best approach. 😃

While this project's installation instructions defaults to using npm for package management, installation via other package managers, such as yarn, should be a matter of simply swapping out npm commands with those of the relevant package manager.

User Stories

  • I want to perform data analysis and data science tasks in JavaScript and Node.js, similar to how I might use Python, Julia, R, and MATLAB.

  • I am building a web application.

    • I plan on using Browserify, Webpack, and other bundlers for use in web browsers.

      • Install individual packages. Installing the entire project is likely unnecessary and will lead to slower installation times.
    • I would like to vendor a custom bundle containing various stdlib functionality.

    • I would like to include stdlib functionality by just using a script tag.

      • I would like to use ES Modules.

        • Use an individual package's ES Module build.
      • I would like to use a pre-built bundle (possibly via a CDN, such as unpkg or jsDelivr).

        • Install (or consume via a CDN) an individual package's pre-built UMD browser bundle.
    • I am interested in using a substantial amount of functionality found in a top-level stdlib namespace and don't want to separately install hundreds of individual packages (e.g., if building an on-line calculator application and wanting all of stdlib's math functionality).

      • Install one or more top-level namespaces. Installing the entire project is likely unnecessary and will lead to slower installation times. Installing a top-level namespace is likely to mean installing functionality which will never be used; however, installing a top-level namespace is likely to be easier and less time-consuming than installing many individual packages separately.

        When bundling, installing a top-level namespace should not be a concern, as individual functionality can still be independently required/imported. Project installation times may, however, be somewhat slower.

  • I am building a Node.js server application.

    • I am interested in using various functionality found in stdlib.

      • Install individual packages. Installing the entire project is likely unnecessary and will lead to slower installation times.
    • I would like to vendor stdlib functionality and avoid dependency trees.

      • Install individual package UMD bundles.
    • I am interested in using a substantial amount of functionality found in a top-level stdlib namespace and don't want to separately install hundreds of individual packages.

      • Install one or more top-level namespaces. Installing the entire project is likely unnecessary and will lead to slower installation times. Installing a top-level namespace is likely to mean installing functionality which will never be used; however, installing a top-level namespace is likely to be easier and less time-consuming than installing many individual packages separately.
  • I am using Deno.

  • I would like to use stdlib functionality in an Observable notebook.

  • I want to hack at stdlib, possibly even creating customized builds to link to platform-specific native libraries (such as Intel's MKL or some other numerical library).

Complete Library

To install the entire project as a library or application dependency,

$ npm install @stdlib/stdlib

Once installed, stdlib packages can be individually required/imported to minimize load times and decrease bundle sizes. For example, to use require

var ndarray = require( '@stdlib/ndarray/array' );

var arr = ndarray( [ [ 1, 2 ], [ 3, 4 ] ] );
// returns <ndarray>

and to use import

import ndarray from '@stdlib/ndarray/array';

var arr = ndarray( [ [ 1, 2 ], [ 3, 4 ] ] );
// returns <ndarray>

Individual Packages

stdlib is designed to allow decomposition of the main project into individual packages which can be independently consumed. Accordingly, users of the project can avoid installing all project functionality and only install the exact functionality they need.

To install individual packages, replace forward slashes / after @stdlib/ with hyphens -. For example,

$ npm install @stdlib/ndarray-array

Once installed, individual packages can be required/imported. For example, to use require

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

var arr = ndarray( [ [ 1, 2 ], [ 3, 4 ] ] );
// returns <ndarray>

and to use import

import ndarray from '@stdlib/ndarray-array';

var arr = ndarray( [ [ 1, 2 ], [ 3, 4 ] ] );
// returns <ndarray>

Namespaces

stdlib is comprised of various top-level namespaces (i.e., collections of related functionality united by common themes). For example, to install all math functionality found in the top-level math namespace,

$ npm install @stdlib/math

Once installed, packages within a top-level namespace can be individually required/imported to minimize load times and decrease bundle sizes. For example, to use require

var sin = require( '@stdlib/math/base/special/sin' );

var v = sin( 3.14 );
// returns <number>

and to use import

import sin from '@stdlib/math/base/special/sin';

var v = sin( 3.14 );
// returns <number>

Note: installing nested namespaces found within top-level namespaces (e.g., math/base) is not supported. Consider installing individual packages or the relevant top-level namespace.

Command-line Utility

To install globally for use as a command-line utility and/or use the REPL,

$ npm install -g @stdlib/stdlib

which will expose the stdlib command. For example, to see available sub-commands

$ stdlib help

and to run the REPL

$ stdlib repl

Environment Builds

ES Modules

To use ES Modules via a <script> tag, use ES Module builds available in each package's repository via a dedicated esm branch (e.g., see the esm branch for @stdlib/math-base-special-erf). For example,

<script type="module">
import linspace from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-base-linspace@esm/index.mjs';
import erf from 'https://cdn.jsdelivr.net/gh/stdlib-js/math-base-special-erf@esm/index.mjs';

const x = linspace( -10.0, 10.0, 100 );

for ( let i = 0; i < x.length; i++ ) {
    console.log( 'x: %d, erf(x): %d', x[ i ], erf( x[ i ] ) );
}
</script>

Deno

To use individual packages in Deno, use Deno builds available in each package's repository via a dedicated deno branch (e.g., see the deno branch for @stdlib/ndarray-array). For example,

import ndarray from 'https://cdn.jsdelivr.net/gh/stdlib-js/ndarray-array@deno/mod.js';

var arr = ndarray( [ [ 1, 2 ], [ 3, 4 ] ] );
// returns <ndarray>

jQuery-like Bundle

For those wanting a jQuery-like bundle, one can use pre-built distributable UMD bundles for use in browser environments or as shared ("vendored") libraries in server environments available in each package's repository via a dedicated umd branch. See sections UMD and Node.js for more details.

UMD

To use UMD bundles either via a <script> tag or in Observable, use UMD browser builds available in each package's repository via a dedicated umd branch (e.g., see the umd branch for @stdlib/math-base-special-erf). For example,

<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/array-base-linspace@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/math-base-special-erf@umd/browser.js"></script>
<script type="text/javascript">
(function () {

var x = linspace( -10.0, 10.0, 100 );

for ( var i = 0; i < x.length; i++ ) {
    console.log( 'x: %d, erf(x): %d', x[ i ], erf( x[ i ] ) );
}

})();
</script>

Node.js

To vendor stdlib functionality and avoid installing dependency trees, use UMD server builds available in each package's repository via a dedicated umd branch (e.g., see the umd branch for @stdlib/math-base-special-erf). For example,

var linspace = require( '/path/to/vendor/umd/@stdlib/array-base-linspace' );
var erf = require( '/path/to/vendor/umd/@stdlib/math-base-special-erf' );

var x = linspace( -10.0, 10.0, 100 );

for ( var i = 0; i < x.length; i++ ) {
    console.log( 'x: %d, erf(x): %d', x[ i ], erf( x[ i ] ) );
}

Custom Bundles

To create a custom bundle based on project needs,

  1. follow the download, configuration, and installation instructions as described in the development guide.

  2. navigate to the local installation directory.

  3. run the following command to print help documentation for providing a list of stdlib package names to bundle

    $ NODE_PATH=./lib/node_modules node ./bin/cli bundle-pkg-list -- -h
  4. modify and run the above command with the list of packages to bundle

    $ NODE_PATH=./lib/node_modules node ./bin/cli bundle-pkg-list -- <pkg> <pkg> <pkg> ...

Upon generating a bundle, the bundle can be loaded via a <script> tag as described above for pre-built distributable UMD bundles.

System Library

To install as a system library (e.g., for the purposes of creating custom builds), follow the download, configuration, and installation instructions as described in the development guide.


Prerequisites

Installing and running stdlib for use in Node.js requires the following prerequisites:

  • Node.js: JavaScript runtime (version >= 0.10)
  • npm: package manager (version > 2.7.0; if Node < 1.0.0, version > 2.7.0 and < 4.0.0; if Node <= 10.x.x, version > 2.7.0 and < 6.0.0)

Most functionality in stdlib is implemented in JavaScript and no further prerequisites are required to use stdlib (i.e., you can safely avoid installing any additional prerequisites); however, some implementations try to capture performance benefits by using native bindings and/or WebAssembly. While not required to run stdlib, as every stdlib implementation has a JavaScript fallback, the following dependencies are required for building native add-ons, including linking to BLAS and LAPACK libraries:

  • GNU make: development utility and task runner
  • GNU bash: an sh-compatible shell
  • gcc & g++ or Clang: C/C++ compilation and linking (g++ version >= 4.8; clang version >= 3.5, Xcode version >=8.3.1 on OS X)
  • gfortran: Fortran compilation and linking (version >= 4.8)

While not required to run stdlib, the following dependencies are required for automatically downloading external libraries:

  • curl, wget, or fetch (FreeBSD): utilities for downloading remote resources

The following external libraries can be automatically downloaded and compiled from source using make:

  • OpenBLAS: optimized BLAS library
  • Electron: framework for cross-platform desktop applications

Contributing

First time contributor?

Already an expert?

  • Fork the repository.

  • Clone the forked repository

    $ git clone --depth=1 https://github.com/<username>/stdlib.git

    where <username> is your GitHub username.

  • Navigate to the stdlib directory

    $ cd stdlib
  • Install dependencies

    $ make install-node-modules
  • Initialize your stdlib development environment

    $ make init

Sponsors

stdlib development is generously supported by the following sponsors...

Are you interested in supporting stdlib? If so, join our Open Collective!


Users

The following organizations and key stakeholders trust and depend on stdlib...

Does your organization or company use stdlib? If so, we'd love to hear from you!


Governance

For information about the governance of the stdlib project, see GOVERNANCE.md.

License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.


Status

Version

git tag NPM version Node.js version

Community

Chat

Package Sidebar

Install

npm i @stdlib/stdlib

Weekly Downloads

934

Version

0.2.0

License

Apache-2.0 AND BSL-1.0

Unpacked Size

173 kB

Total Files

38

Last publish

Collaborators

  • stdlib-bot
  • kgryte
  • planeshifter
  • rreusser