Plot a "graph theoretic" graph.
GPLOT(A,xy) plots the graph specified by A and xy.
A graph, G, is a set of nodes numbered from 1 to n,
and a set of connections, or edges, between them.
In order to plot G, two matrices are needed.
The adjacency matrix, A, has a(i,j) nonzero if and
only if node i is connected to node j. The coordinates
array, xy, is an n-by-2 matrix with the position for
node i in the i-th row, xy(i,:) = [x(i) y(i)].
GPLOT(A,xy,lc) uses line type and color instead of the
default, 'r-'. For example, lc = 'g:'. See PLOT .
[X,Y] = GPLOT(A,xy) returns the NaN-punctuated vectors
X and Y without actually generating a plot. These vectors
can be used to generate the plot at a later time if desired.
See also SPY , TREEPLOT , SUBMESH, UNMESH .