gplot - Plot nodes and links representing adjacency matrix

Syntax

Description

The gplot function graphs a set of coordinates using an adjacency matrix.

gplot(A,Coordinates) plots a graph of the nodes defined in Coordinates according to the n-by-n adjacency matrix A, where n is the number of nodes. Coordinates is an n-by-2 matrix, where n is the number of nodes and each coordinate pair represents one node.

gplot(A,Coordinates,LineSpec) plots the nodes using the line type, marker symbol, and color specified by LineSpec.

Tips

For two-dimensional data, Coordinates(i,:) = [x(i) y(i)] denotes node i, and Coordinates(j,:) = [x(j)y(j)] denotes node j. If node i and node j are connected, A(i,j) or A(j,i) is nonzero; otherwise, A(i,j) and A(j,i) are zero.

Examples

Plot half of a "Bucky ball" carbon molecule, placing asterisks at each node:

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

See Also

LineSpec | sparse | spy

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