matlab digraph

Matlab has a built-in class called "digraph" for creating and manipulating directed graphs.

Here's an example of how to create a simple directed graph with three nodes (A, B, C) and two edges (A->B, B->C) using the digraph function:

G = digraph([1 2],[2 3]);

This creates a digraph object called "G" with two edges connecting nodes 1 and 2, and nodes 2 and 3.

You can also specify edge weights using a third argument to the digraph function:

G = digraph([1 2],[2 3],[0.5 1.0]);

This creates a digraph object with the same edges as before, but with edge weights of 0.5 and 1.0 respectively.

Once you have created a digraph object, you can use a variety of built-in functions to manipulate and analyze the graph structure. For example:

- plot(G) will plot the graph using a default layout
- indegree(G) and outdegree(G) will return arrays of the in-degree and out-degree of each node in the graph
- shortestpath(G, start_node, end_node) will return the shortest path between two nodes in the graph, using Dijkstra's algorithm

For more information on how to use the digraph class in Matlab, see the documentation here: https://www.mathworks.com/help/matlab/ref/digraph.html