graphology

What is graphology?

Graphology is a robust and versatile JavaScript library for creating, manipulating, and analyzing graphs. It provides a comprehensive set of tools for working with both directed and undirected graphs, and supports various graph algorithms and data structures.

What are graphology's main functionalities?

Graph Creation

This feature allows you to create a new graph, add nodes, and add edges between nodes. The code sample demonstrates creating a graph, adding two nodes ('John' and 'Jane'), and adding an edge between them.

const Graph = require('graphology');
const graph = new Graph();
graph.addNode('John');
graph.addNode('Jane');
graph.addEdge('John', 'Jane');
console.log(graph.nodes()); // ['John', 'Jane']
console.log(graph.edges()); // [{ source: 'John', target: 'Jane' }]

Graph Algorithms

Graphology supports various graph algorithms, such as Dijkstra's shortest path algorithm. The code sample demonstrates creating a graph with weighted edges and finding the shortest path from node 'A' to node 'C'.

const Graph = require('graphology');
const { dijkstra } = require('graphology-shortest-path');
const graph = new Graph();
graph.addNode('A');
graph.addNode('B');
graph.addNode('C');
graph.addEdge('A', 'B', { weight: 1 });
graph.addEdge('B', 'C', { weight: 2 });
graph.addEdge('A', 'C', { weight: 4 });
const path = dijkstra(graph, 'A', 'C');
console.log(path); // ['A', 'B', 'C']

Graph Analysis

Graphology provides tools for analyzing graphs, such as calculating centrality metrics. The code sample demonstrates creating a graph and calculating the degree centrality of each node.

const Graph = require('graphology');
const { degreeCentrality } = require('graphology-metrics/centrality');
const graph = new Graph();
graph.addNode('A');
graph.addNode('B');
graph.addNode('C');
graph.addEdge('A', 'B');
graph.addEdge('B', 'C');
graph.addEdge('A', 'C');
const centrality = degreeCentrality(graph);
console.log(centrality); // { A: 2, B: 2, C: 2 }

Other packages similar to graphology

cytoscape

Cytoscape.js is a graph theory library for visualization and analysis. It is highly optimized for large graphs and provides a rich set of features for graph manipulation and visualization. Compared to Graphology, Cytoscape.js is more focused on visualization and interactive graph exploration.

vis-network

vis-network is a dynamic, browser-based visualization library for network graphs. It allows for interactive exploration and manipulation of graphs. While Graphology focuses on graph data structures and algorithms, vis-network emphasizes visualization and user interaction.

sigma

Sigma is a JavaScript library dedicated to graph drawing. It provides a simple way to visualize graphs and supports various layout algorithms. Sigma is more focused on rendering and visualizing graphs, whereas Graphology provides a more comprehensive set of tools for graph manipulation and analysis.

README

Graphology

graphology is a specification for a robust & multipurpose JavaScript Graph object and aiming at supporting various kinds of graphs under a same unified interface.

You will also find here the source for the reference implementation of this specification.

Documentation

Full documentation for the library/specs is available here.

Changelog

0.25.1

• Fixing #.hasEdge methods for multigraphs.
• Fixing #.degreeWithoutSelfLoops methods for multigraphs.