** 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 . **

** **