/** @return closest valid runtime node (not to be used while building world) */
private Vector2 getClosestNode(float x, float y) {
if (movementGraph.containsVertex(new Vector2(x, y))) return new Vector2(x, y);
for (float dst = 1; dst < 100; dst++)
for (float angle = 0; angle < Math.PI * 2; angle += Math.PI / 12) {
int xtmp = (int) (x + Math.cos(angle) * dst);
int ytmp = (int) (y + Math.sin(angle) * dst);
if (movementGraph.containsVertex(new Vector2(xtmp, ytmp))) return new Vector2(xtmp, ytmp);
}
return new Vector2(x, y);
}
// select a node according to degrees
public Integer SelectNode_PA() throws IOException {
HashMap<Integer, Double> node_degree = new HashMap<Integer, Double>();
for (int n : G.vertexSet()) {
node_degree.put(n, (double) G.degreeOf(n));
}
RandomProb rp = new RandomProb<Integer>();
Integer selected_node = (Integer) (rp.randomPro(node_degree));
return selected_node;
}
/** Generate vertices for the graph representing the floor plan */
private void generateVertices() {
for (int row = 0; row < rowCount; ++row) {
for (int col = 0; col < colCount; ++col) {
cellContainer[row][col] = new Cell(row, col, this);
g.addVertex(cellContainer[row][col]);
}
}
}
public AIWorld(World gameWorld) {
synchronized (gameWorld) {
movementGraph = GraphGenerator.generateGraph(gameWorld);
}
logger.info(
"Initialized graph with "
+ movementGraph.edgeSet().size()
+ " edges and "
+ movementGraph.vertexSet().size()
+ " vertices");
world = new World(new Vector2(), true);
PhysicsHelper.createLoaderBodies(
world, Gdx.files.internal("data/world/world.json"), "strategicPoints");
strategicPoints = GraphGenerator.generateStrategicPoints(world);
logger.info("Loaded ai world and found " + strategicPoints.size() + " strategic points");
createGraphVisible();
EventManager.addListener(EventEnum.PARSER_AI_GRAPH_VISIBLE, this);
}
/** @return the largest connected component of the graph. */
public ArrayList<Cell> getLargestConnectedComponent() {
ArrayList<ArrayList<Cell>> components = new ArrayList<>();
boolean visited[][] = new boolean[rowCount][colCount];
for (int row = 0; row < rowCount; ++row)
for (int col = 0; col < colCount; ++col) visited[row][col] = false;
Queue<Cell> q;
Cell t = null, u = null;
for (Cell c : g.vertexSet()) {
if (!visited[c.getRow()][c.getCol()]) {
q = new LinkedList<Cell>();
ArrayList<Cell> component = new ArrayList<>();
visited[c.getRow()][c.getCol()] = true;
// Find all connected nodes
q.add(c);
component.add(c);
while (!q.isEmpty()) {
t = q.remove();
for (WeightedEdge e : g.edgesOf(t)) {
u = t.equals(g.getEdgeSource(e)) ? g.getEdgeTarget(e) : g.getEdgeSource(e);
if (!visited[u.getRow()][u.getCol()]) {
visited[u.getRow()][u.getCol()] = true;
q.add(u);
component.add(u);
}
}
}
components.add(component);
}
}
int largestSize = 0, largestIndex = 0;
for (int i = 0; i < components.size(); ++i) {
if (components.get(i).size() > largestSize) {
largestSize = components.get(i).size();
largestIndex = i;
}
}
filterGraph(components.get(largestIndex));
return components.get(largestIndex);
}
/**
* Remove all edges connecting dead cells with others Call this after loading this entity from db
* OR after config is changed. (i.e., after ratio or actualW or actualH is changed)
*/
public void updateGraph() {
cellContainer = new Cell[rowCount][colCount];
initGraph();
int row, col;
for (DeadPoint dp : deadPoints) {
col = getCorrespondingCol(dp.getX());
row = getCorrespondingRow(dp.getY());
if (valid(row, col)) g.removeVertex(cellContainer[row][col]);
}
}
private int outputInterestingStuff(
Vertex v1,
Vertex v2,
SimpleWeightedGraph<Vertex, DefaultWeightedComparableEdge> probabilityGraph) {
for (DefaultWeightedComparableEdge e : probabilityGraph.edgesOf(v1)) {
System.err.print(probabilityGraph.getEdgeWeight(e) + "\t");
}
System.err.println();
for (DefaultWeightedComparableEdge e : probabilityGraph.edgesOf(v2)) {
System.err.print(probabilityGraph.getEdgeWeight(e) + "\t");
}
System.err.println();
JFrame frame = new JFrame("Continue?");
frame.pack();
frame.setVisible(false);
return JOptionPane.showConfirmDialog(frame, "hey", "there", 2);
}
public Queue<Vector2> getPathToPoint(Vector2 origin, Vector2 destination) {
LinkedList<Vector2> steps = new LinkedList<Vector2>();
Vector2 originRounded = getClosestNode(Math.round(origin.x), Math.round(origin.y));
Vector2 destinationRounded =
getClosestNode(Math.round(destination.x), Math.round(destination.y));
try {
List<DefaultWeightedEdge> list =
DijkstraShortestPath.findPathBetween(movementGraph, originRounded, destinationRounded);
for (DefaultWeightedEdge edge : list) steps.add(movementGraph.getEdgeSource(edge));
steps.add(movementGraph.getEdgeTarget(list.get(list.size() - 1)));
} catch (Exception e) {
logger.warning(
"Error pathfinding for origin="
+ originRounded
+ " destination="
+ destinationRounded
+ " with message: "
+ e.getMessage());
}
return steps;
}
public void randomwalk(int v) {
// weighted random walk
RandomWalk rw = new RandomWalk(p_w);
int status = rw.stay_move();
ArrayList<Integer> walkpath = new ArrayList<Integer>();
Integer u = v;
walkpath.add(v);
while (status == 1) // keep moving until status = 0
{
u = rw.move(G, u);
if (u == null) // no neighbors
break;
if (!walkpath.contains(u)) walkpath.add(u);
status = rw.stay_move();
}
// System.out.println("walking length: "+ Integer.toString(walkpath.size()));
for (int i = 0; i < walkpath.size(); i++)
for (int j = i + 1; j < walkpath.size(); j++) {
int m = walkpath.get(i);
int n = walkpath.get(j);
if (!G.containsEdge(m, n)) {
double distance = Math.abs(socialposition.get(m) - socialposition.get(n));
double prob = linkprob(distance, (j - i));
if (random.nextDouble() < prob) {
G.setEdgeWeight((DefaultWeightedEdge) G.addEdge(m, n), 1);
}
} else {
DefaultWeightedEdge edge = G.getEdge(m, n);
G.setEdgeWeight(edge, G.getEdgeWeight(edge) + 1);
}
}
return;
}
/**
* Links all the spots in the selection, in time-forward order.
*
* @param model the model to modify.
* @param selectionModel the selection that contains the spots to link.
*/
public static void linkSpots(final Model model, final SelectionModel selectionModel) {
/*
* Configure tracker
*/
final TrackableObjectCollection<Spot> spots =
new DefaultTOCollection<Spot>(selectionModel.getSpotSelection());
final Map<String, Object> settings = new HashMap<String, Object>(1);
settings.put(KEY_LINKING_MAX_DISTANCE, Double.POSITIVE_INFINITY);
final NearestNeighborTracker<Spot> tracker = new NearestNeighborTracker<Spot>(spots, settings);
tracker.setNumThreads(1);
/*
* Execute tracking
*/
if (!tracker.checkInput() || !tracker.process()) {
System.err.println("Problem while computing spot links: " + tracker.getErrorMessage());
return;
}
final SimpleWeightedGraph<Spot, DefaultWeightedEdge> graph = tracker.getResult();
/*
* Copy found links in source model
*/
model.beginUpdate();
try {
for (final DefaultWeightedEdge edge : graph.edgeSet()) {
final Spot source = graph.getEdgeSource(edge);
final Spot target = graph.getEdgeTarget(edge);
model.addEdge(source, target, graph.getEdgeWeight(edge));
}
} finally {
model.endUpdate();
}
}
/**
* Disable the cell containing the given point
*
* @param x
* @param y
*/
public void disableCell(int x, int y) {
int col = getCorrespondingCol(x);
int row = getCorrespondingRow(y);
// If a cell is already dead, it wouldn't be disabled again; Do this to reduce the number of
// dead points created
if (valid(row, col) && !cellContainer[row][col].isDead()) {
cellContainer[row][col].disableCell();
deadPoints.add(new DeadPoint(x, y, this));
// removing this cell from the graph and all of its touching edges
g.removeVertex(cellContainer[row][col]);
}
}
private void createGraphVisible() {
if (graphVisibleBodies == null) graphVisibleBodies = new ArrayList<Body>();
for (int i = 0; i < graphVisibleBodies.size(); i++)
world.destroyBody(graphVisibleBodies.get(i));
graphVisibleBodies.clear();
if (nodesVisible)
for (Vector2 node : movementGraph.vertexSet())
PhysicsHelper.createCircle(world, BodyType.StaticBody, .1f, 1, FactionType.NEUTRAL)
.setTransform(node, 0);
if (edgesVisible)
for (DefaultWeightedEdge edge : movementGraph.edgeSet()) {
Vector2 source = movementGraph.getEdgeSource(edge),
target = movementGraph.getEdgeTarget(edge);
PhysicsHelper.createEdge(
world,
BodyType.StaticBody,
source.x,
source.y,
target.x,
target.y,
1,
FactionType.NEUTRAL);
}
}
// global attachment -- with prob 1
public void globalattach(int v) throws IOException {
Integer u = random.nextInt(N);
while (u == v) u = random.nextInt(N);
if (!G.containsEdge(v, u)) {
G.setEdgeWeight((DefaultWeightedEdge) G.addEdge(v, u), 1);
} else {
DefaultWeightedEdge edge = G.getEdge(v, u);
G.setEdgeWeight(edge, G.getEdgeWeight(edge) + 1);
}
}
/**
* Compute the log-probability that each observation arises for each ant. This is represented by a
* simple weighted graph, where the absence of an edge represents zero probability that the given
* observation was caused by the given ant. Currently the log-prob is set to be a truncated iid
* Gaussian around an ant location.
*
* @param probabilityGraph The probability graph being constructed.
* @param edgeMap A sorted map of the edges in probabilityGraph.
* @param thisObservedPosMap Observed points along with index.
* @param thisParticlePosMap Current particle locations.
* @param obsSums
* @param antSums
* @return Sum of edge weights
*/
private double computeLogProbabilityGraph(
SimpleWeightedGraph<Vertex, DefaultWeightedComparableEdge> probabilityGraph,
ValueSortedMap<DefaultWeightedComparableEdge, Double> edgeMap,
HashMap<Vertex, Point> thisObservedPosMap,
HashMap<Vertex, AntPath> thisParticlePathMap) {
/** Initialize vertices. */
edgeMap.clear();
probabilityGraph.addVertex(falseNegative);
probabilityGraph.addVertex(falsePositive);
for (Vertex v : thisObservedPosMap.keySet()) {
probabilityGraph.addVertex(v);
DefaultWeightedComparableEdge edge = probabilityGraph.addEdge(v, falsePositive);
probabilityGraph.setEdgeWeight(edge, falsePositiveLogProb);
edgeMap.put(edge, falsePositiveLogProb);
}
for (Vertex v : thisParticlePathMap.keySet()) {
probabilityGraph.addVertex(v);
DefaultWeightedComparableEdge edge = probabilityGraph.addEdge(v, falseNegative);
probabilityGraph.setEdgeWeight(edge, falseNegativeLogProb);
edgeMap.put(edge, falseNegativeLogProb);
}
/** Compute probability of each observation given each ant path */
for (Entry<Vertex, Point> obsEntry : thisObservedPosMap.entrySet()) {
for (Entry<Vertex, AntPath> parEntry : thisParticlePathMap.entrySet()) {
double logprob = observationLogProbGivenAntPath(obsEntry.getValue(), parEntry.getValue());
if (logprob > logProbThreshold) {
DefaultWeightedComparableEdge edge =
probabilityGraph.addEdge(obsEntry.getKey(), parEntry.getKey());
probabilityGraph.setEdgeWeight(edge, logprob);
edgeMap.put(edge, logprob);
}
}
}
/** Adjust probabilities according to log-probability of an AntPath existing. */
for (Entry<Vertex, AntPath> antEntry : thisParticlePathMap.entrySet()) {
Set<DefaultWeightedComparableEdge> edge = probabilityGraph.edgesOf(antEntry.getKey());
double antProb = antEntry.getValue().getCurrentLogProb();
for (DefaultWeightedComparableEdge e : edge) {
double ew = probabilityGraph.getEdgeWeight(e);
probabilityGraph.setEdgeWeight(e, ew + antProb);
// edgeMap.remove(edge);
edgeMap.put(e, ew + antProb);
}
}
/**
* ANG -- to do Interaction effects: -- probability of false negative higher when multiple ants
* in same area. however, there is a high probability that there will be SOME observation in the
* area. -- probability of a false positive higher when there is one ant in a region. this is
* because sometimes one ant is split into two.
*/
/** compute vertex sums */
// Utils.computeVertexSums(probabilityGraph);
double totalLogProb = Utils.maxstar(edgeMap);
return totalLogProb;
}
/**
* Remove all nodes which are NOT in cells from graph g
*
* @param cells
*/
private void filterGraph(ArrayList<Cell> cells) {
for (int row = 0; row < rowCount; ++row)
for (int col = 0; col < colCount; ++col)
if (!cells.contains(cellContainer[row][col])) g.removeVertex(cellContainer[row][col]);
}
/**
* Add edges connecting this cell and its 8 (or less) neighbors
*
* @param row
* @param col
*/
private void addEdges(int row, int col) {
System.out.println("Adding (" + row + ", " + col + ")");
// Add weighted edge
// North
if (row > 0 && g.containsVertex(cellContainer[row][col])) {
g.addEdge(cellContainer[row][col], cellContainer[row - 1][col]);
g.setEdgeWeight(g.getEdge(cellContainer[row][col], cellContainer[row - 1][col]), 1);
// NE
if (col < colCount - 1 && g.containsVertex(cellContainer[row - 1][col + 1])) {
g.addEdge(cellContainer[row][col], cellContainer[row - 1][col + 1]);
g.setEdgeWeight(
g.getEdge(cellContainer[row][col], cellContainer[row - 1][col + 1]), Math.sqrt(2.0));
}
}
// East
if (col < colCount - 1 && g.containsVertex(cellContainer[row][col + 1])) {
g.addEdge(cellContainer[row][col], cellContainer[row][col + 1]);
g.setEdgeWeight(g.getEdge(cellContainer[row][col], cellContainer[row][col + 1]), 1);
// SE
if (row < rowCount - 1 && g.containsVertex(cellContainer[row + 1][col + 1])) {
g.addEdge(cellContainer[row][col], cellContainer[row + 1][col + 1]);
g.setEdgeWeight(
g.getEdge(cellContainer[row][col], cellContainer[row + 1][col + 1]), Math.sqrt(2.0));
}
}
// South
if (row < rowCount - 1 && g.containsVertex(cellContainer[row + 1][col])) {
g.addEdge(cellContainer[row][col], cellContainer[row + 1][col]);
g.setEdgeWeight(g.getEdge(cellContainer[row][col], cellContainer[row + 1][col]), 1);
// SW
if (col > 0 && g.containsVertex(cellContainer[row + 1][col - 1])) {
g.addEdge(cellContainer[row][col], cellContainer[row + 1][col - 1]);
g.setEdgeWeight(
g.getEdge(cellContainer[row][col], cellContainer[row + 1][col - 1]), Math.sqrt(2.0));
}
}
// West
if (col > 0 && g.containsVertex(cellContainer[row][col - 1])) {
g.addEdge(cellContainer[row][col], cellContainer[row][col - 1]);
g.setEdgeWeight(g.getEdge(cellContainer[row][col], cellContainer[row][col - 1]), 1);
// NW
if (row > 0 && g.containsVertex(cellContainer[row - 1][col - 1])) {
g.addEdge(cellContainer[row][col], cellContainer[row - 1][col - 1]);
g.setEdgeWeight(
g.getEdge(cellContainer[row][col], cellContainer[row - 1][col - 1]), Math.sqrt(2.0));
}
}
}
/**
* Reads the geometry and connectivity.
*
* @param filename the location of the gjf file
*/
public GJFfile(String filename) {
super(filename);
// read geometry
String name = "";
List<Atom> contents = new ArrayList<>();
SimpleWeightedGraph<Atom, DefaultWeightedEdge> connectivity =
new SimpleWeightedGraph<>(DefaultWeightedEdge.class);
int blanks = 0;
boolean lastBlank = false;
boolean inGeometryBlock = false;
for (List<String> line : fileContents) {
// keep track of how many blanks we have seen
if (line.size() == 1 && line.get(0).length() == 0) {
if (lastBlank == false) {
blanks++;
lastBlank = true;
}
continue;
} else lastBlank = false;
// read the metadata
if (blanks == 1) {
for (String s : line) {
String[] fields = s.split("@");
if (fields.length != 3) continue;
String identifier = fields[1].toLowerCase();
String value = fields[2];
// System.out.println(s);
// System.out.println(identifier + " : " + value);
if (identifier.equals("o1")) O1Number = Integer.parseInt(value);
else if (identifier.equals("o2")) O2Number = Integer.parseInt(value);
else if (identifier.equals("n3")) N3Number = Integer.parseInt(value);
else if (identifier.equals("cl1")) Cl1Number = Integer.parseInt(value);
else if (identifier.equals("su2")) Su2Number = Integer.parseInt(value);
else if (identifier.equals("ol3")) Ol3Number = Integer.parseInt(value);
else if (identifier.equals("mem")) mem = Integer.parseInt(value);
else if (identifier.equals("nprocshared")) nprocshared = Integer.parseInt(value);
else if (identifier.equals("method")) method = value;
else if (identifier.equals("basis")) basis = value;
else System.out.println("unrecognized entry: " + s);
}
continue;
} else if (blanks != 2) continue;
// deal with the charge and multiplicity card (by ignoring it)
if (line.size() == 2 && inGeometryBlock == false) {
inGeometryBlock = true;
continue;
}
if (line.size() != 4 && inGeometryBlock == false)
throw new IllegalArgumentException(
"unexpected text in geometry block in " + filename + ":\n" + line.toString());
// create atom
// tinker atom types will be nonsense, of course
Atom newAtom =
new Atom(
line.get(0),
new Vector3D(
Double.parseDouble(line.get(1)),
Double.parseDouble(line.get(2)),
Double.parseDouble(line.get(3))),
1);
contents.add(newAtom);
connectivity.addVertex(newAtom);
}
// read connectivity
blanks = 0;
lastBlank = false;
for (List<String> line : fileContents) {
// read the fourth block of text
if (line.size() == 1 && line.get(0).length() == 0) {
if (lastBlank == false) {
blanks++;
lastBlank = true;
}
continue;
} else lastBlank = false;
// only read connectivity lines
if (blanks != 3) continue;
Atom fromAtom = contents.get(Integer.parseInt(line.get(0)) - 1);
for (int i = 1; i < line.size(); i += 2) {
int toAtomIndex = Integer.parseInt(line.get(i)) - 1;
Atom toAtom = contents.get(toAtomIndex);
double bondOrder = Double.parseDouble(line.get(i + 1));
DefaultWeightedEdge thisEdge = connectivity.addEdge(fromAtom, toAtom);
connectivity.setEdgeWeight(thisEdge, bondOrder);
}
}
// create the molecule
molecule = new Molecule(name, contents, connectivity, 0.0);
}
public static void main(String[] args) throws IOException {
System.out.println("Enter parameters: N p_w p_r steps:");
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String paras[] = reader.readLine().split(" ");
N = Integer.parseInt(paras[0]);
p_w = Float.parseFloat(paras[1]);
p_r = Float.parseFloat(paras[2]);
steps = Integer.parseInt(paras[3]);
} catch (IOException e) {
System.out.println("Error reading from user");
}
long start = System.currentTimeMillis();
int simulations = 1;
for (int t = 1; t <= simulations; t++) {
// Initialization, generate an empty network of N nodes
EIM dynamic = new EIM();
G = new SimpleWeightedGraph<Integer, DefaultWeightedEdge>(DefaultWeightedEdge.class);
for (int i = 0; i < N; i++) G.addVertex(i);
String para = "EIM_" + Integer.toString(t);
String folder = "files/" + "Networks" + "/";
File f = new File(folder);
if (f.exists() == false) {
f.mkdirs();
}
// distribution of social space
socialposition = dynamic.uniform(N);
for (int s = 0; s < steps; s++) {
int v = random.nextInt(N);
// LA process - weighted random walk + link with social distance
dynamic.localattach(v);
// GA process
// no edges, create one random link
if (G.edgesOf(v).size() == 0) {
dynamic.globalattach(v);
} else {
float prob = random.nextFloat();
if (prob < p_r) dynamic.globalattach(v);
}
// ND process
int d = random.nextInt(N);
if (G.edgesOf(d).size() > 0) {
float prob = random.nextFloat();
if (prob < p_d) {
Set<DefaultWeightedEdge> edges = new HashSet(G.edgesOf(d));
G.removeAllEdges(edges);
}
}
if (s % 100000 == 0) {
System.out.print("Steps:" + Integer.toString(s) + " ");
System.out.print("Edges:");
System.out.print(G.edgeSet().size() + " ");
System.out.println(
"Avg_degree: "
+ Float.toString((float) G.edgeSet().size() * 2 / G.vertexSet().size()));
}
}
// delete isolate nodes
ArrayList<Integer> nodelist = new ArrayList<Integer>();
for (int node : G.vertexSet()) nodelist.add(node);
for (int node : nodelist) {
if (G.degreeOf(node) == 0) G.removeVertex(node);
}
System.out.print("Nodes:");
System.out.println(G.vertexSet().size());
System.out.print("Edges:");
System.out.println(G.edgeSet().size());
// get largest connected component
Statistics stat = new Statistics();
Graph G_LCC = stat.largestConnectedComponent(G);
ExportGraph export = new ExportGraph();
export.exportWPairs((SimpleWeightedGraph<Integer, DefaultWeightedEdge>) G_LCC, para, folder);
System.out.print("Nodes in LCC:");
System.out.println(G_LCC.vertexSet().size());
System.out.print("Edges in LCC:");
System.out.println(G_LCC.edgeSet().size());
System.out.println("Avg_degree: " + Double.toString(stat.avg_degree(G_LCC)));
System.out.println("Avg_clustering: " + Double.toString(stat.avg_clustering(G_LCC)));
System.out.println(
"Degree assortativity: " + Double.toString(stat.assortativityCoefficient(G_LCC)));
}
long elapsedTimeMillis = System.currentTimeMillis() - start;
float elapsedTimeHour = elapsedTimeMillis / (60 * 60 * 1000F);
System.out.print("Elapsed time: ");
System.out.print(elapsedTimeHour);
System.out.println(" hours.");
}
// Create shortest-path graph for every vertex by depth-first traversal algorithm
private Multigraph<String, DefaultEdge> DijkstraAlgorithm(
WeightedMultigraph<String, DefaultWeightedEdge> originalGraph, String thisVertex) {
// 1. Simplify the multi-graph of the active power flow into a simple graph
SimpleWeightedGraph<String, DefaultWeightedEdge> originalSimpleGraph =
new SimpleWeightedGraph<String, DefaultWeightedEdge>(DefaultWeightedEdge.class);
for (String curVertex : originalGraph.vertexSet()) originalSimpleGraph.addVertex(curVertex);
for (DefaultWeightedEdge curEdge : originalGraph.edgeSet()) {
String sourceVertex = originalGraph.getEdgeSource(curEdge);
String targetVertex = originalGraph.getEdgeTarget(curEdge);
if (originalSimpleGraph.containsEdge(sourceVertex, targetVertex)) {
DefaultWeightedEdge modifiedEdge = originalSimpleGraph.getEdge(sourceVertex, targetVertex);
double newEdgeWeight =
originalSimpleGraph.getEdgeWeight(modifiedEdge) + originalGraph.getEdgeWeight(curEdge);
originalSimpleGraph.setEdgeWeight(modifiedEdge, newEdgeWeight);
} else {
DefaultWeightedEdge newEdge = new DefaultWeightedEdge();
originalSimpleGraph.addEdge(sourceVertex, targetVertex, newEdge);
originalSimpleGraph.setEdgeWeight(newEdge, originalGraph.getEdgeWeight(curEdge));
}
}
// Issue (2010/10/25): Maybe larger amount of active power transfer still means weaker
// relationship between the two terminal buses of a certain branch,
// thus originalSimpleGraph other than inverseGraph should be used here.
// Use the inverse of active power to build a new weighted directed graph (the larger the active
// power is, the close the two buses will be)
// SimpleDirectedWeightedGraph<String, DefaultWeightedEdge> inverseGraph =
// new SimpleDirectedWeightedGraph<String, DefaultWeightedEdge>(DefaultWeightedEdge.class);
// for (String curVertex : originalSimpleGraph.vertexSet())
// inverseGraph.addVertex(curVertex);
// for (DefaultWeightedEdge curEdge : originalSimpleGraph.edgeSet()) {
// String sourceVertex = originalSimpleGraph.getEdgeSource(curEdge);
// String targetVertex = originalSimpleGraph.getEdgeTarget(curEdge);
// DefaultWeightedEdge newEdge = new DefaultWeightedEdge();
// inverseGraph.addEdge(sourceVertex, targetVertex, newEdge);
// inverseGraph.setEdgeWeight(newEdge, 1 / originalSimpleGraph.getEdgeWeight(curEdge));
// }
// 2. Initialize the map of vertices and the corresponding weights (distance from current vertex
// to the first vertex)
HashMap<String, Double> mapVertexShortestDistance = new HashMap<String, Double>();
// for (String thisOriginalVertex : inverseGraph.vertexSet())
for (String thisOriginalVertex : originalSimpleGraph.vertexSet())
mapVertexShortestDistance.put(thisOriginalVertex, 10E10);
// The weight of the first vertex is zero
mapVertexShortestDistance.put(thisVertex, 0.0);
// 3. Depth-first traversing, update the shortest-path values
Stack<String> bfiVertices =
new Stack<String>(); // Stack to store passed vertices in a breadth-first traversing
// The map of a weighted edge and the flag of having been visited
// HashMap<DefaultWeightedEdge, Boolean> mapEdgeVisited = new HashMap<DefaultWeightedEdge,
// Boolean>();
// for (DefaultWeightedEdge thisEdge : inverseGraph.edgeSet())
// mapEdgeVisited.put(thisEdge, false);
String currentVertex = thisVertex;
bfiVertices.push(currentVertex);
// System.out.println(bfiVertices.toString());
while (!bfiVertices.isEmpty()) {
// Operate the following codes for those edges started with current vertex
boolean hasNewEdge = false;
// for (DefaultWeightedEdge curEdge : inverseGraph.outgoingEdgesOf(currentVertex)) {
for (DefaultWeightedEdge curEdge : originalSimpleGraph.edgesOf(currentVertex)) {
// if (!mapEdgeVisited.get(curEdge)) { // Used for those edges that have not been treated
// yet
// 3.1. Mark current edge as already been visited
// mapEdgeVisited.put(curEdge, true);
// String nextVertex = inverseGraph.getEdgeTarget(curEdge);
String nextVertex = originalSimpleGraph.getEdgeTarget(curEdge);
// 3.2. Update shortest-path values
double curSD = mapVertexShortestDistance.get(currentVertex);
// double edgeWeight = inverseGraph.getEdgeWeight(curEdge);
double edgeWeight = originalSimpleGraph.getEdgeWeight(curEdge);
double newSD = curSD + edgeWeight;
if (mapVertexShortestDistance.get(nextVertex) > newSD) {
hasNewEdge = true;
mapVertexShortestDistance.put(nextVertex, newSD);
// 3.3. Push the target vertex of current edge into the stack
bfiVertices.push(nextVertex);
// System.out.println(bfiVertices.toString());
break;
// System.out.println("New shortest path [" + nextVertex + "]: " + newSD);
}
// }
}
if (!hasNewEdge) {
bfiVertices.pop();
}
if (!bfiVertices.isEmpty()) currentVertex = bfiVertices.peek();
}
// 4. Create shortest-path digraph of current vertex
// 4.1. Initialize the shortest-path digraph
Multigraph<String, DefaultEdge> shortestPathGraph =
new Multigraph<String, DefaultEdge>(DefaultEdge.class);
// 4.2. Add all qualified edges
// for (DefaultWeightedEdge curEdge : inverseGraph.edgeSet()) {
for (DefaultWeightedEdge curEdge : originalSimpleGraph.edgeSet()) {
// 4.2.1. Evaluate if current edge is suitable
// String sourceVertex = inverseGraph.getEdgeSource(curEdge);
// String targetVertex = inverseGraph.getEdgeTarget(curEdge);
String sourceVertex = originalSimpleGraph.getEdgeSource(curEdge);
String targetVertex = originalSimpleGraph.getEdgeTarget(curEdge);
// if (Math.abs(inverseGraph.getEdgeWeight(curEdge) -
if (originalSimpleGraph.getEdgeWeight(curEdge) > 1.0E-5) {
if (Math.abs(
originalSimpleGraph.getEdgeWeight(curEdge)
- (mapVertexShortestDistance.get(targetVertex)
- mapVertexShortestDistance.get(sourceVertex)))
< 1.0E-5) {
// 4.2.2. Add suitable edge that found just now
DefaultEdge newEdge = new DefaultEdge();
if (!shortestPathGraph.containsVertex(sourceVertex))
shortestPathGraph.addVertex(sourceVertex);
if (!shortestPathGraph.containsVertex(targetVertex))
shortestPathGraph.addVertex(targetVertex);
shortestPathGraph.addEdge(sourceVertex, targetVertex, newEdge);
}
}
}
return shortestPathGraph;
}
public EdgeBetweennessGraph(WeightedMultigraph<String, DefaultWeightedEdge> originalGraph) {
super(DefaultWeightedEdge.class); // Constructor inherented from parent class
// 1. Initialize the edge betweenness digraph
// 1.1. Add vertices
for (String thisVertex : originalGraph.vertexSet()) this.addVertex(thisVertex);
// 1.2. Add edges
for (DefaultWeightedEdge thisEdge : originalGraph.edgeSet()) {
DefaultWeightedEdge newEdge = new DefaultWeightedEdge();
String sendingName = originalGraph.getEdgeSource(thisEdge);
String receivingName = originalGraph.getEdgeTarget(thisEdge);
this.addEdge(sendingName, receivingName, newEdge);
this.setEdgeWeight(newEdge, 0.0);
}
// 1.3. Create corresponding unweighted graph
// 1.3.1. Add vertices
WeightedMultigraph<String, DefaultWeightedEdge> originalUnweightedGraph =
new WeightedMultigraph<String, DefaultWeightedEdge>(DefaultWeightedEdge.class);
for (String thisVertex : originalGraph.vertexSet())
originalUnweightedGraph.addVertex(thisVertex);
// 1.3.2. Add edges
for (DefaultWeightedEdge thisEdge : originalGraph.edgeSet()) {
DefaultWeightedEdge newEdge = new DefaultWeightedEdge();
String sendingName = originalGraph.getEdgeSource(thisEdge);
String receivingName = originalGraph.getEdgeTarget(thisEdge);
originalUnweightedGraph.addEdge(sendingName, receivingName, newEdge);
originalUnweightedGraph.setEdgeWeight(newEdge, 1.0);
}
for (String thisVertex : this.vertexSet()) {
// 2. Create shortest-path graph for every vertex by Dijkstra algorithm
Multigraph<String, DefaultEdge> shortestPathDigraph =
DijkstraAlgorithm(originalUnweightedGraph, thisVertex);
// 3. Calculate the contribution of current vertex's shortest-path graph to final edge
// betweenness (Newman algorithm)
SimpleWeightedGraph<String, DefaultWeightedEdge> edgeBetweennessDigraph =
NewmanAlgorithm(shortestPathDigraph, thisVertex);
// 4. Update final edge betweenness digraph with current vertex's shortest-path graph
if (edgeBetweennessDigraph != null)
for (DefaultWeightedEdge thisEdge : edgeBetweennessDigraph.edgeSet()) {
String sourceVertex = edgeBetweennessDigraph.getEdgeSource(thisEdge);
String targetVertex = edgeBetweennessDigraph.getEdgeTarget(thisEdge);
double betweennessWeight = edgeBetweennessDigraph.getEdgeWeight(thisEdge);
DefaultWeightedEdge edgeInWholeGraph = this.getEdge(sourceVertex, targetVertex);
double newWeight = this.getEdgeWeight(edgeInWholeGraph) + betweennessWeight;
this.setEdgeWeight(edgeInWholeGraph, newWeight);
}
}
// 5. Revise the edge betweenness digraph with the original active power digraph
for (DefaultWeightedEdge thisEdge : this.edgeSet()) {
String sourceVertex = this.getEdgeSource(thisEdge);
String targetVertex = this.getEdgeTarget(thisEdge);
double betweennessWeight = this.getEdgeWeight(thisEdge);
DefaultWeightedEdge edgeInWholeGraph = originalGraph.getEdge(sourceVertex, targetVertex);
double newWeight = betweennessWeight / originalGraph.getEdgeWeight(edgeInWholeGraph);
this.setEdgeWeight(thisEdge, newWeight);
// System.out.println("Final edge betweenness between " + sourceVertex + " and " +
// targetVertex + ": " + newWeight);
}
}
// Calculate the contribution of current vertex's shortest-path graph to final edge betweenness
// (Newman algorithm)
// M. E. J. Newman and M. Girvan, Finding and evaluating community structure in networks, Physical
// Review E69, 026113 (2004)
private SimpleWeightedGraph<String, DefaultWeightedEdge> NewmanAlgorithm(
Multigraph<String, DefaultEdge> shortestPathGraph, String thisVertex) {
if (shortestPathGraph.edgeSet().size() == 0) // No outer degree
return null;
// 1. Initialize the edge betweenness digraph
SimpleWeightedGraph<String, DefaultWeightedEdge> edgeBetweennessDigraph =
new SimpleWeightedGraph<String, DefaultWeightedEdge>(DefaultWeightedEdge.class);
// Add vertices
for (String curVertex : shortestPathGraph.vertexSet())
edgeBetweennessDigraph.addVertex(curVertex);
// 2. Deal with corresponding edges
// 2.1. Calculate vertex distance and weight
// 2.1.1. Initialize related variables
HashMap<String, Integer> mapVertexDistance = new HashMap<String, Integer>(); // Vertex distance
for (String curVertex : shortestPathGraph.vertexSet()) mapVertexDistance.put(curVertex, 0);
HashMap<String, Double> mapVertexWeight = new HashMap<String, Double>(); // Vertex weight
for (String curVertex : shortestPathGraph.vertexSet()) mapVertexWeight.put(curVertex, 1.0);
Queue<String> verticesQueue = new LinkedList<String>(); // Store the queue of operated vertices
// 2.1.2. Traverse the shortest-path digraph, get corresponding vertex distance and weight
verticesQueue.add(thisVertex);
String currentVertex = thisVertex;
while (!verticesQueue.isEmpty()) {
// 2.1.2.1. Read the bottom vertex in the queue, deal with all adjacent edges
for (DefaultEdge curEdge : shortestPathGraph.edgesOf(currentVertex)) {
String targetVertex = shortestPathGraph.getEdgeTarget(curEdge);
if (mapVertexDistance.get(targetVertex)
== 0) { // Target vertex value hasn't been evaluated yet
mapVertexDistance.put(targetVertex, mapVertexDistance.get(currentVertex) + 1);
mapVertexWeight.put(targetVertex, mapVertexWeight.get(currentVertex));
verticesQueue.add(targetVertex);
}
// Target vertex value has already been set to source vertex distance plus 1
else if (mapVertexDistance.get(targetVertex) == (mapVertexDistance.get(currentVertex) + 1))
mapVertexWeight.put(
targetVertex, mapVertexWeight.get(targetVertex) + mapVertexWeight.get(currentVertex));
}
// 2.1.2.2. All adjacent edges have been treated, remove the bottom element
verticesQueue.remove();
currentVertex = verticesQueue.peek();
}
// 2.2. Calculate the contribution of every edges to the edge betweenness
// 2.2.1. Sort the vertices descendingly by the distance to the first vertex
List<Map.Entry<String, Integer>> listVertexDistance =
new ArrayList<Map.Entry<String, Integer>>(mapVertexDistance.entrySet());
Collections.sort(
listVertexDistance,
new Comparator<Map.Entry<String, Integer>>() { // Sorting the list descendingly
@Override
public int compare(Entry<String, Integer> o1, Entry<String, Integer> o2) {
return (o2.getValue().compareTo(o1.getValue()));
}
});
// 2.2.2. Traverse the shortest-path digraph with the sorted vertices list
for (Map.Entry<String, Integer> thisVertexDistance : listVertexDistance) {
currentVertex = thisVertexDistance.getKey();
for (DefaultEdge curEdge : shortestPathGraph.edgesOf(currentVertex)) {
// 2.2.2.1. Get the source vertex
String sourceVertex = shortestPathGraph.getEdgeSource(curEdge);
String targetVertex = shortestPathGraph.getEdgeTarget(curEdge);
String anotherVertex = "";
if (currentVertex.equals(sourceVertex)) anotherVertex = targetVertex;
else if (currentVertex.equals(targetVertex)) anotherVertex = sourceVertex;
// 2.2.2.2. Calculate the value of the sum of all adjacent edges plus 1
double totalSubWeights = 1.0;
for (DefaultWeightedEdge curSubEdge : edgeBetweennessDigraph.edgesOf(currentVertex))
totalSubWeights += edgeBetweennessDigraph.getEdgeWeight(curSubEdge);
// 2.2.2.3. The new edge weight is calculated as totalSubWeights * (the quotient of the
// weights of the two terminals)
double wi = mapVertexWeight.get(anotherVertex);
double wj = mapVertexWeight.get(currentVertex);
totalSubWeights /= wi / wj;
// 2.2.2.4. Add new edge with correct weight into the edge betweenness digraph
DefaultWeightedEdge newEdge = new DefaultWeightedEdge();
edgeBetweennessDigraph.addEdge(anotherVertex, currentVertex, newEdge);
edgeBetweennessDigraph.setEdgeWeight(newEdge, totalSubWeights);
}
}
return edgeBetweennessDigraph;
}
/**
* Insert a vertex to the graph whose row and col coordinates are as given.
*
* @param row
* @param col
*/
private void addVertexAt(int row, int col) {
g.addVertex(cellContainer[row][col]);
addEdges(row, col);
}
/**
* Simulate next step for the given particle.
*
* @param nextPts
* @param particleNum
*/
public void simulateForwardStep(ArrayList<Point> nextPts, Particle thisParticle) {
HashMap<Vertex, Point> thisObservedPosMap = new HashMap<Vertex, Point>();
HashMap<Vertex, AntPath> thisAntPathMap = new HashMap<Vertex, AntPath>();
thisParticle.currentFalsePositives = new ArrayList<Point>();
for (Point pt : nextPts) {
Vertex vx = new ObsVertex();
thisObservedPosMap.put(vx, pt);
}
for (AntPath ap : thisParticle.getPaths()) {
Vertex vx = new PathVertex();
thisAntPathMap.put(vx, ap);
}
/*
* Compute probability graph for this particle.
*/
SimpleWeightedGraph<Vertex, DefaultWeightedComparableEdge> probabilityGraph =
new SimpleWeightedGraph<Vertex, DefaultWeightedComparableEdge>(
DefaultWeightedComparableEdge.class);
ValueSortedMap<DefaultWeightedComparableEdge, Double> edgeMap =
new ValueSortedMap<DefaultWeightedComparableEdge, Double>(true);
computeLogProbabilityGraph(probabilityGraph, edgeMap, thisObservedPosMap, thisAntPathMap);
// displayLogProbabilityGraph(probabilityGraph,thisObservedPosMap,thisAntPathMap,vertexSums);
/*
* Generate new ant locations based on probability graph. We do this by sampling the most likely event,
* removing this event from the probability graph, updating the prob. graph, then repeating until all
* observations/causes are accounted for.
*
* To do this (relatively) efficiently, we maintain a sorted hash-map of possible observation/cause pairs.
* To avoid having to rescale the entire hash-map every step, we maintain the current sum of weights.
*
* We're also keeping track of the posterior log-probability of the simulated step.
*/
double logprob = 0;
int nfp = 0;
int nfn = 0;
int doOutput = 0;
while (edgeMap.size() > 0) {
/*
* Sample an event from the probability graph.
*/
DefaultWeightedComparableEdge event = sampleEdge(probabilityGraph, edgeMap);
edgeMap.remove(event);
double edgeWeight = probabilityGraph.getEdgeWeight(event);
double thisLogProb = edgeWeight;
logprob = logprob + thisLogProb;
Vertex v1 = probabilityGraph.getEdgeSource(event);
Vertex v2 = probabilityGraph.getEdgeTarget(event);
if (doOutput > 0) {
System.err.println("edgeWeight: " + edgeWeight);
doOutput = outputInterestingStuff(v1, v2, probabilityGraph);
}
if (v1.getClass().equals(ObsVertex.class)) {
assert (v2.getClass().equals(PathVertex.class));
Vertex tv = v1;
v1 = v2;
v2 = tv;
}
/*
* Update the probability graph.
*/
if (!v1.equals(falsePositive)) {
Set<DefaultWeightedComparableEdge> es = probabilityGraph.edgesOf(v1);
for (DefaultWeightedComparableEdge ed : es) edgeMap.remove(ed);
boolean tt = probabilityGraph.removeVertex(v1);
assert (tt);
} else {
nfp += 1;
thisParticle.currentFalsePositives.add(thisObservedPosMap.get(v2));
}
if (!v2.equals(falseNegative)) {
Set<DefaultWeightedComparableEdge> es = probabilityGraph.edgesOf(v2);
for (DefaultWeightedComparableEdge ed : es) edgeMap.remove(ed);
boolean tt = probabilityGraph.removeVertex(v2);
assert (tt);
} else nfn += 1;
// Utils.computeVertexSums(probabilityGraph,vertexSums);
/*
* Update AntPath trajectory.
*/
if (!v1.equals(falsePositive)) {
AntPath ap = thisAntPathMap.get(v1);
assert (ap != null);
Point obs = thisObservedPosMap.get(v2);
Point newPos = new Point();
double thislp = sampleConditionalPos(ap, obs, newPos) + thisLogProb;
ap.updatePosition(newPos, obs, thislp);
}
/*
* Compute likelihoods.
*/
}
}