prefuse.util

Class GraphLib

java.lang.Object

prefuse.util.GraphLib

public class GraphLib
extends java.lang.Object

Library routines for creating various Graph structures. All Graphs generated by methods of this class include a String-valued "label" field.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	LABEL Label data field included in generated Graphs
static Schema	LABEL_SCHEMA Node table schema used for generated Graphs

Method Summary

Modifier and Type	Method and Description
static Tree	getBalancedTree(int breadth, int depth) Returns a balanced tree of the requested breadth and depth.
static Graph	getClique(int n) Returns a clique of given size.
static Tree	getDiamondTree(int b, int d1, int d2) Create a diamond tree, with a given branching factor at each level, and depth levels for the two main branches.
static Graph	getGrid(int m, int n) Returns a graph structured as an m-by-n grid.
static Graph	getHoneycomb(int levels)
static Tree	getLeftDeepTree(int depth) Returns a left deep binary tree
static Graph	getNodes(int n) Builds a completely unconnected (edge-free) graph with the given number of nodes
static Tree	getRightDeepTree(int depth) Returns a right deep binary tree
static Graph	getStar(int n) Builds a "star" graph with one central hub connected to the given number of satellite nodes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LABEL

public static final java.lang.String LABEL

Label data field included in generated Graphs

See Also:

Constant Field Values

LABEL_SCHEMA

public static final Schema LABEL_SCHEMA

Node table schema used for generated Graphs

Method Detail

getNodes

public static Graph getNodes(int n)

Builds a completely unconnected (edge-free) graph with the given number of nodes

Parameters:

n - the number of nodes

Returns:

a graph with n nodes and no edges

getStar

public static Graph getStar(int n)

Builds a "star" graph with one central hub connected to the given number of satellite nodes.

Parameters:

n - the number of points of the star

Returns:

a "star" graph with n points, for a total of n+1 nodes

getClique

public static Graph getClique(int n)

Returns a clique of given size. A clique is a graph in which every node is a neighbor of every other node.

Parameters:

n - the number of nodes in the graph

Returns:

a clique of size n

getGrid

public static Graph getGrid(int m,
                            int n)

Returns a graph structured as an m-by-n grid.

Parameters:

m - the number of rows of the grid

n - the number of columns of the grid

Returns:

an m-by-n grid structured graph

getHoneycomb

public static Graph getHoneycomb(int levels)

getBalancedTree

public static Tree getBalancedTree(int breadth,
                                   int depth)

Returns a balanced tree of the requested breadth and depth.

Parameters:

breadth - the breadth of each level of the tree

depth - the depth of the tree

Returns:

a balanced tree

getLeftDeepTree

public static Tree getLeftDeepTree(int depth)

Returns a left deep binary tree

Parameters:

depth - the depth of the tree

Returns:

the generated tree

getRightDeepTree

public static Tree getRightDeepTree(int depth)

Returns a right deep binary tree

Parameters:

depth - the depth of the tree

Returns:

the generated Tree

getDiamondTree

public static Tree getDiamondTree(int b,
                                  int d1,
                                  int d2)

Create a diamond tree, with a given branching factor at each level, and depth levels for the two main branches.

Parameters:

b - the number of children of each branch node

d1 - the length of the first (left) branch

d2 - the length of the second (right) branch

Returns:

the generated Tree