How can a Legend/Key be created in GraphViz?

edit

A Legend/Key can be created in GraphViz by adding a node or subgraph to the graph that contains a list of symbols and their meanings. Here are the steps to create a Legend/Key:

1. Define a subgraph using the ‘subgraph’ keyword, and give it a label using the ‘label’ keyword.

2. Add nodes to the subgraph to represent the symbols used in the graph. Give each node a label that describes the symbol.

3. Add edges to connect the nodes within the subgraph. These edges can be directed or undirected, depending on the type of graph you are creating.

4. Add a ‘legend’ or ‘key’ label to the subgraph to make it clear what it represents.

5. When you generate your graph in GraphViz, the Legend/Key will appear as a box within the graph, and you can refer to it to understand the symbols used in the graph.

Here is an example of how to create a Legend/Key in GraphViz:

digraph { subgraph cluster_Legend { label="Legend" key1[label="Triangle",shape="triangle"] key2[label="Square",shape="square"] key3[label="Circle",shape="circle"] key1 -> key2 -> key3 } node1 -> node2 -> node3 }

In this example, a Legend/Key subgraph is defined using the ‘subgraph’ keyword, and given a label using the ‘label’ keyword. Three nodes are added to the subgraph to represent the Triangle, Square, and Circle symbols used in the main graph. Each node is given a label that describes the symbol. Directed edges are added to connect the nodes within the subgraph. Finally, a ‘Legend’ label is added to the subgraph to make it clear what it represents.