void test_transformations() {
test_begin("flattening");
std::cout << "Reading the multilayer network...";
MLNetworkSharedPtr mnet = read_multilayer("test/io2.mpx","mlnet 2",',');
ActorSharedPtr u1 = mnet->get_actor("U1");
ActorSharedPtr u2 = mnet->get_actor("U2");
ActorSharedPtr u3 = mnet->get_actor("U3");
std::unordered_set<LayerSharedPtr> layers;
layers.insert(mnet->get_layer("l1"));
layers.insert(mnet->get_layer("l2"));
std::cout << "done!" << std::endl;
std::cout << "Testing weighted flattening...";
LayerSharedPtr new_layer = flatten_weighted(mnet,"flat_weighted",layers,false,false);
if (!mnet->is_directed(new_layer,new_layer)) throw FailedUnitTestException("Layer should be directed");
if (mnet->get_nodes(new_layer).size() != 6) throw FailedUnitTestException("Wrong number of nodes");
if (mnet->get_edges(new_layer,new_layer).size() != 10) throw FailedUnitTestException("Wrong number of edges");
NodeSharedPtr n1 = mnet->get_node(u1,new_layer);
NodeSharedPtr n2 = mnet->get_node(u2,new_layer);
NodeSharedPtr n3 = mnet->get_node(u3,new_layer);
if (mnet->get_weight(n1,n2) != 1) throw FailedUnitTestException("Wrong weight, expected 1");
if (mnet->get_weight(n1,n3) != 2) throw FailedUnitTestException("Wrong weight, expected 2");
std::cout << "done!" << std::endl;
std::cout << "Testing or flattening...";
new_layer = flatten_unweighted(mnet,"flat_or",layers,false,false);
if (!mnet->is_directed(new_layer,new_layer)) throw FailedUnitTestException("Layer should be directed");
if (mnet->get_nodes(new_layer).size() != 6) throw FailedUnitTestException("Wrong number of nodes");
if (mnet->get_edges(new_layer,new_layer).size() != 10) throw FailedUnitTestException("Wrong number of edges");
std::cout << "done!" << std::endl;
test_end("flattening");
test_begin("projection");
/*
std::cout << "Reading the multilayer network...";
MLNetworkSharedPtr mnet_p = read_multilayer("test/io4.mln","interdependent",',');
LayerSharedPtr A = mnet_p->get_layer("A");
LayerSharedPtr P = mnet_p->get_layer("P");
std::cout << "done!" << mnet_p->to_string() << std::endl;
std::cout << "Testing clique projection...";
LayerSharedPtr projected_layer = project_unweighted(mnet_p,"flat_weighted",A,P);
if (mnet_p->is_directed(projected_layer,projected_layer)) throw FailedUnitTestException("Layer should be undirected");
if (mnet_p->get_nodes(projected_layer).size() != 5) throw FailedUnitTestException("Wrong number of nodes");
if (mnet_p->get_edges(projected_layer,projected_layer).size() != 5) throw FailedUnitTestException("Wrong number of edges");
std::cout << "done!" << std::endl;
*/
test_end("projection");
}
// TODO document: does not consider self edges
property_matrix<dyad,LayerSharedPtr,bool> edge_existence_property_matrix(const MLNetworkSharedPtr& mnet) {
long n = mnet->get_actors()->size();
property_matrix<dyad,LayerSharedPtr,bool> P(n*(n-1)/2,mnet->get_layers()->size(),false);
for (LayerSharedPtr layer: *mnet->get_layers()) {
for (EdgeSharedPtr e: *mnet->get_edges(layer,layer)) {
dyad d(e->v1->actor,e->v2->actor);
P.set(d,layer,true);
}
}
return P;
}
hashtable<NodeSharedPtr,coordinates> multiforce(MLNetworkSharedPtr mnet, double width, double length, int iterations) {
hashtable<NodeSharedPtr,coordinates> pos;
hashtable<NodeSharedPtr,coordinates> disp;
double t = std::sqrt(width*width+length*length);
double area = width*length;
double k = std::sqrt(area/mnet->get_actors().size());
for (ActorSharedPtr a: mnet->get_actors()) {
double y = drand()*length-length/2;
double x = drand()*width-width/2;
for (NodeSharedPtr n: mnet->get_nodes(a)) {
pos[n].y = x;
pos[n].x = y;
pos[n].z = mnet->get_layers().get_index(n->layer->id);
}
}
for (int i=0; i<iterations; i++) {
// calculate repulsive forces
for (LayerSharedPtr l: mnet->get_layers()) {
for (NodeSharedPtr v: mnet->get_nodes(l)) {
disp[v].x = 0;
disp[v].y = 0;
for (NodeSharedPtr u: mnet->get_nodes(l)) {
if (u == v) continue;
coordinates Delta;
Delta.x = pos[v].x - pos[u].x;
Delta.y = pos[v].y - pos[u].y;
double DeltaNorm = std::sqrt(Delta.x*Delta.x+Delta.y*Delta.y);
disp[v].x = disp[v].x + Delta.x/DeltaNorm*fr(DeltaNorm,k);
disp[v].y = disp[v].y + Delta.y/DeltaNorm*fr(DeltaNorm,k);
}
}
}
// calculate attractive forces inside each layer for ((u, v) ∈ E) do
for (LayerSharedPtr l: mnet->get_layers()) {
for (EdgeSharedPtr e: mnet->get_edges(l,l)) {
NodeSharedPtr v = e->v1;
NodeSharedPtr u = e->v2;
coordinates Delta;
Delta.x = pos[v].x - pos[u].x;
Delta.y = pos[v].y - pos[u].y;
double DeltaNorm = std::sqrt(Delta.x*Delta.x+Delta.y*Delta.y);
disp[v].x = disp[v].x - Delta.x/DeltaNorm*fain(DeltaNorm,k);
disp[v].y = disp[v].y - Delta.y/DeltaNorm*fain(DeltaNorm,k);
disp[u].x = disp[u].x + Delta.x/DeltaNorm*fain(DeltaNorm,k);
disp[u].y = disp[u].y + Delta.y/DeltaNorm*fain(DeltaNorm,k);
}
}
// calculate attractive forces across layers
for (ActorSharedPtr a: mnet->get_actors()) {
for (NodeSharedPtr v: mnet->get_nodes(a)) {
for (NodeSharedPtr u: mnet->get_nodes(a)) {
if (v == u) continue;
coordinates Delta;
Delta.x = pos[v].x - pos[u].x;
Delta.y = pos[v].y - pos[u].y;
double DeltaNorm = std::sqrt(Delta.x*Delta.x+Delta.y*Delta.y);
disp[v].x = disp[v].x - Delta.x/DeltaNorm*fainter(DeltaNorm,k);
disp[v].y = disp[v].y - Delta.y/DeltaNorm*fainter(DeltaNorm,k);
disp[u].x = disp[u].x + Delta.x/DeltaNorm*fainter(DeltaNorm,k);
disp[u].y = disp[u].y + Delta.y/DeltaNorm*fainter(DeltaNorm,k);
}
}
}
// assign new positions
for (NodeSharedPtr v: mnet->get_nodes()) {
double dispNorm = std::sqrt(disp[v].x*disp[v].x+disp[v].y*disp[v].y);
pos[v].x = pos[v].x + (disp[v].x/dispNorm);//*std::min(dispNorm,t);
pos[v].y = pos[v].y + (disp[v].y/dispNorm);//*std::min(dispNorm,t);
//pos[v].x = std::min(width/2, std::max(-width/2, pos[v].x));
//pos[v].y = std::min(length/2, std::max(-length/2, pos[v].y));
}
// reduce the temperature
t -= (t-1)/(iterations+1);
}
// DEBUG PRINT
double min_x = 100000000;
double min_y = 100000000;
double max_x = -100000000;
double max_y = -100000000;
for (NodeSharedPtr v: mnet->get_nodes()) {
if (pos[v].x < min_x) min_x = pos[v].x;
if (pos[v].y < min_y) min_y = pos[v].y;
if (pos[v].x > max_x) max_x = pos[v].x;
if (pos[v].y > max_y) max_y = pos[v].y;
}
std::cout << "plot(c(),xlim=c(" << min_x << "," << max_x << "),ylim=c(" << min_y << "," << max_y << "))" << std::endl;
//std::cout << "legend(4,4,0:" << (iterations-1) << ",fill=1:" << (iterations) << ")" << std::endl;
for (NodeSharedPtr n: mnet->get_nodes()) {
std::cout << "points(" << pos[n].x << "," << pos[n].y << ")" << std::endl;
}
for (EdgeSharedPtr e: mnet->get_edges()) {
std::cout << "lines(c(" << pos[e->v1].x << "," << pos[e->v2].x << "),c(" << pos[e->v1].y << "," << pos[e->v2].y << "))" << std::endl;
}
//
return pos;
}