https://github.com/stdlib-js/utils-compact-adjacency-matrix
Compact adjacency matrix.
https://github.com/stdlib-js/utils-compact-adjacency-matrix
adjacency dag data data-structure data-structures graph javascript matrix node node-js nodejs stdlib structure topological toposort tsort util utilities utility utils
Last synced: 3 months ago
JSON representation
Compact adjacency matrix.
- Host: GitHub
- URL: https://github.com/stdlib-js/utils-compact-adjacency-matrix
- Owner: stdlib-js
- License: apache-2.0
- Created: 2021-06-15T16:10:44.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2024-04-12T09:27:22.000Z (over 1 year ago)
- Last Synced: 2025-07-02T22:07:24.941Z (3 months ago)
- Topics: adjacency, dag, data, data-structure, data-structures, graph, javascript, matrix, node, node-js, nodejs, stdlib, structure, topological, toposort, tsort, util, utilities, utility, utils
- Language: JavaScript
- Homepage: https://github.com/stdlib-js/stdlib
- Size: 1.44 MB
- Stars: 2
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
- Citation: CITATION.cff
- Security: SECURITY.md
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README
About stdlib...
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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!
# CompactAdjacencyMatrix
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
> Compact adjacency matrix constructor.
## Installation
```bash
npm install @stdlib/utils-compact-adjacency-matrix
```
Alternatively,
- To load the package in a website via a `script` tag without installation and bundlers, use the [ES Module][es-module] available on the [`esm`][esm-url] branch (see [README][esm-readme]).
- If you are using Deno, visit the [`deno`][deno-url] branch (see [README][deno-readme] for usage intructions).
- For use in Observable, or in browser/node environments, use the [Universal Module Definition (UMD)][umd] build available on the [`umd`][umd-url] branch (see [README][umd-readme]).
The [branches.md][branches-url] file summarizes the available branches and displays a diagram illustrating their relationships.
To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.
## Usage
```javascript
var CompactAdjacencyMatrix = require( '@stdlib/utils-compact-adjacency-matrix' );
```
#### CompactAdjacencyMatrix( N )
Returns a compact adjacency matrix instance.
```javascript
var adj = new CompactAdjacencyMatrix( 4 );
// returns
// ...
adj.addEdge( 0, 1 );
adj.addEdge( 0, 2 );
adj.addEdge( 1, 2 );
adj.addEdge( 2, 3 );
```
## Examples
```javascript
var CompactAdjacencyMatrix = require( '@stdlib/utils-compact-adjacency-matrix' );
// Create a new adjacency matrix:
var adj = new CompactAdjacencyMatrix( 4 );
// Add edges:
adj.addEdge( 1, 0 );
adj.addEdge( 1, 2 );
adj.addEdge( 0, 2 );
adj.addEdge( 2, 3 );
// Compute the indegrees and outdegrees for each vertex:
var id;
var od;
var i;
for ( i = 0; i < 4; i++ ) {
id = adj.inDegree( i );
od = adj.outDegree( i );
console.log( 'vertex: %d. indegree: %d. outdegree: %d.', i, id, od );
}
// Print the list of all edges:
console.log( adj.edges );
// => [ [ 0, 2 ], [ 1, 0 ], [ 1, 2 ], [ 2, 3 ] ]
// Convert the adjacency matrix to an adjacency list representation:
console.log( adj.toAdjacencyList() );
// => [ [ 2 ], [ 0, 2 ], [ 3 ], [] ]
// Compute a topological ordering:
console.log( adj.toposort() );
// => [ [ 1, 0, 2, 3 ], null ]
```
* * *
## Notice
This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].
#### Community
[![Chat][chat-image]][chat-url]
---
## License
See [LICENSE][stdlib-license].
## Copyright
Copyright © 2016-2024. The Stdlib [Authors][stdlib-authors].
[npm-image]: http://img.shields.io/npm/v/@stdlib/utils-compact-adjacency-matrix.svg
[npm-url]: https://npmjs.org/package/@stdlib/utils-compact-adjacency-matrix
[test-image]: https://github.com/stdlib-js/utils-compact-adjacency-matrix/actions/workflows/test.yml/badge.svg?branch=main
[test-url]: https://github.com/stdlib-js/utils-compact-adjacency-matrix/actions/workflows/test.yml?query=branch:main
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/utils-compact-adjacency-matrix/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/utils-compact-adjacency-matrix?branch=main
[chat-image]: https://img.shields.io/gitter/room/stdlib-js/stdlib.svg
[chat-url]: https://app.gitter.im/#/room/#stdlib-js_stdlib:gitter.im
[stdlib]: https://github.com/stdlib-js/stdlib
[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors
[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
[deno-url]: https://github.com/stdlib-js/utils-compact-adjacency-matrix/tree/deno
[deno-readme]: https://github.com/stdlib-js/utils-compact-adjacency-matrix/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/utils-compact-adjacency-matrix/tree/umd
[umd-readme]: https://github.com/stdlib-js/utils-compact-adjacency-matrix/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/utils-compact-adjacency-matrix/tree/esm
[esm-readme]: https://github.com/stdlib-js/utils-compact-adjacency-matrix/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/utils-compact-adjacency-matrix/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/utils-compact-adjacency-matrix/main/LICENSE