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;
}