Plot a Directed Graph

plots a directed graph represented by an adjacency matrix and xy points

Description

GPLOTD(A,XY) Plots the Directed Graph represented by adjacency matrix A and points xy using the default style described below
GPLOTD(A,XY,PARAM1,VAL1,...) Plots the Directed Graph using valid parameter name/value pairs
 
Inputs:
A - NxN adjacency matrix, where A(I,J) is nonzero if and only if there is an edge between points I and J
xy - Nx2 matrix of x/y coordinates
... - Parameter name/value pairs that are consistent with valid PLOT parameters can also be specified
 
Default Plot Style Details:
1. Undirected (2-way) edges are plotted in solid black lines
2. Directed (1-way) edges are plotted in two styles
 a. If the edge connects a larger vertex ID with a smaller ID, the edge is plotted as a blue dashed line
 b. If the edge connects a smaller vertex ID with a larger ID, the edge is plotted as a red dotted line
3. Any vertex that is connected to itself is plotted with a black circle around it

Acknowledgements

This file inspired Plot A Directed Graph (V2.0).

• MATLAB release: MATLAB 7.4 (R2007a)

[Alexander]

I found the GUI a little crude, I found other programmes where the incident matrix is specified far more adaptable and easier to apply

[YF]

 

[Joseph Kirk]

Kong,
1. Not sure what you mean by this. There is a '.' Marker used for the nodes.
2. Read the help notes. Rather than using arrows, a different line style is used to represent directed/undirected edges.

[YF]

U`ve done amazing work.But actually,there`re 2 prob. 1,no mark of the nodes,don`t know which node represent which vertice;2,no arrow...it`s not a 'directed' graph

[David Grymin]

 

[Doug Harriman]

While graphviz is external, Matlab ships with a version of the program. Search for 'mwdot' and 'mwneato' in the bin directory of your install. It provides excellent graph layout functionality.

[The Author]

Scott - I'll consider making an update with your suggested capability.
Kevin - I submit that MATLAB users should not need external software to perform simple tasks. Besides, up until now, I'd never heard of AT&T graphviz (so there are probably many other MATLAB users that are unaware of it as well - and even after seeing what it has to offer, I'm not convinced it would serve the MATLAB community much better)

[Kevin Nasman]

Why not just use AT&T graphviz? It works well from Matlab.

[Scott Miller]

I'm missing the point of why you are plotting directed graphs using a color code based on the relative magnitudes of the ID numbers and the edge direction rather than plotting arrows based on edge direction. There are several nice routines for plotting arrowheads in the FEX, and this should be an option, if not the default.