Question

Is there a way to draw a graph from the Incidence matrix.
By graph I mean http://en.wikipedia.org/wiki/Graph_(mathematics) not a plot.

Up till now I found only how to convert incidence matrix to a adjacency matrix.
In R this is possible with an igraph library. So is there an easy way to do it in matlab

Answer 1

You may use gplot:

k = 1:30;
[B,XY] = bucky;
gplot(B(k,k),XY(k,:),'-*')
axis square

This function is commonly used in machine learning problems. While searching up I’ve seen an implementation for weighted graph plotting.

http://www.mathworks.com/help/matlab/ref/gplot.html

EDIT:

dt = 2*pi/10;
t = dt:dt:2*pi;
x = cos(t); y = sin(t);
A = ones(10);
gplot(A,[x' y']);
A = ones(3,3);
gplot(A,[x' y']);
a = [0 1 1; 1 0 0; 1 1 0];
gplot(a,[x' y'] ,'-*');

All you have to do is make sure the XY plane has sufficient (x,y) pairs for each node in your graph.

Here is A’s gplot: