Graphology Components

Connected components for graphology.

Installation

npm install graphology-components

Usage

• forEachConnectedComponent
• forEachConnectedComponentOrder
• countConnectedComponents
• connectedComponents
• largestConnectedComponent
• largestConnectedComponentSubgraph
• cropToLargestConnectedComponent
• stronglyConnectedComponents

forEachConnectedComponent

Iterates over the connected components of the given graph using a callback.

import {forEachConnectedComponent} from 'graphology-components';

forEachConnectedComponent(graph, component => {
  console.log(component);
});

forEachConnectedComponentOrder

Specialized version of forEachConnectedComponent that iterates over the connected component orders, i.e. the number of nodes they contain.

It consumes less memory than a naive approach mapping the component lengths using forEachConnectedComponent.

import {forEachConnectedComponentOrder} from 'graphology-components';

forEachConnectedComponentOrder(graph, order => {
  console.log(order);
});

countConnectedComponents

Returns the number of connected components of the given graph.

import {countConnectedComponents} from 'graphology-components';

const count = countConnectedComponents(graph);

connectedComponents

Returns the list of connected components of the given graph.

import {connectedComponents} from 'graphology-components';

const components = connectedComponents(graph);

If your graph is mixed or directed, the result will be what are usually called weakly connected components.

largestConnectedComponent

Returns the largest connected component of the given graph.

import {largestConnectedComponent} from 'graphology-components';

const largest = largestConnectedComponent(graph);

largestConnectedComponentSubgraph

Returns a subgraph of the largest connected component of the given graph.

import {largestConnectedComponentSubgraph} from 'graphology-components';

const subgraph = largestConnectedComponentSubgraph(graph);

cropToLargestConnectedComponent

Mutates the given graph to remove nodes and edges that are not part of its largest connected component.

import {cropToLargestConnectedComponent} from 'graphology-components';

cropToLargestConnectedComponent(graph);

stronglyConnectedComponents

Returns the list of strongly connected components of the given graph. (mixed or directed)

import {stronglyConnectedComponents} from 'graphology-components';

const components = stronglyConnectedComponents(graph);