PGraph WriteGraph(TStr Filename) {
int NNodes = 100;
PGraph Graph = PGraph::TObj::New();
for (int i = 0; i < NNodes; i++) {
Graph->AddNode(i);
}
for (int i = 1; i < NNodes - 1; i++) {
Graph->AddEdge(i, i+1);
Graph->AddEdge(i, i-1);
}
TFOut OutStream(Filename);
Graph->Save(OutStream);
return Graph;
}
int main(int argc, char* argv[]) {
//// what type of graph do you want to use?
//typedef PUNGraph PGraph; // undirected graph
typedef PNGraph PGraph; // directed graph
//typedef PNEGraph PGraph; // directed multigraph
//typedef TPt<TNodeNet<TInt> > PGraph;
//typedef TPt<TNodeEdgeNet<TInt, TInt> > PGraph;
// this code is independent of what particular graph implementation/type we use
printf("Creating graph:\n");
PGraph G = PGraph::TObj::New();
for (int n = 0; n < 15; n++) {
G->AddNode(); // if no parameter is given, node ids are 0,1,...,9
}
G->AddEdge(1, 4);
printf(" Edge 1 -- 4 added\n");
G->AddEdge(1, 3);
printf(" Edge 1 -- 3 added\n");
G->AddEdge(2, 5);
printf(" Edge 2 -- 5 added\n");
G->AddEdge(3, 2);
printf(" Edge 3 -- 2 added\n");
G->AddEdge(3, 5);
printf(" Edge 3 -- 5 added\n");
G->AddEdge(3, 10);
printf(" Edge 3 -- 10 added\n");
G->AddEdge(4, 5);
printf(" Edge 4 -- 5 added\n");
G->AddEdge(4, 7);
printf(" Edge 4 -- 7 added\n");
G->AddEdge(4, 8);
printf(" Edge 4 -- 8 added\n");
G->AddEdge(5, 6);
printf(" Edge 5 -- 6 added\n");
G->AddEdge(6, 13);
printf(" Edge 6 -- 13 added\n");
G->AddEdge(7, 4);
printf(" Edge 7 -- 4 added\n");
G->AddEdge(8, 7);
printf(" Edge 8 -- 7 added\n");
G->AddEdge(8, 9);
printf(" Edge 8 -- 9 added\n");
G->AddEdge(9, 10);
printf(" Edge 9 -- 10 added\n");
G->AddEdge(9, 12);
printf(" Edge 9 -- 12 added\n");
G->AddEdge(10, 3);
printf(" Edge 10 -- 3 added\n");
G->AddEdge(10, 6);
printf(" Edge 10 -- 6 added\n");
G->AddEdge(11, 12);
printf(" Edge 11 -- 12 added\n");
G->AddEdge(12, 9);
printf(" Edge 12 -- 9 added\n");
G->AddEdge(12, 11);
printf(" Edge 12 -- 11 added\n");
G->AddEdge(12, 14);
printf(" Edge 12 -- 14 added\n");
G->AddEdge(13, 14);
printf(" Edge 13 -- 14 added\n");
G->AddEdge(14, 13);
printf(" Edge 14 -- 13 added\n");
/*for (int e = 0; e < 10; e++) {
const int NId1 = G->GetRndNId();
const int NId2 = G->GetRndNId();
if (G->AddEdge(NId1, NId2) != -2) {
printf(" Edge %d -- %d added\n", NId1, NId2); }
else {
printf(" Edge %d -- %d already exists\n", NId1, NId2); }
}*/
IAssert(G->IsOk());
//G->Dump();
// delete
//PGraph::TObj::TNodeI NI = G->GetNI(0);
//printf("Delete edge %d -- %d\n", NI.GetId(), NI.GetOutNId(0));
//G->DelEdge(NI.GetId(), NI.GetOutNId(0));
const int RndNId = G->GetRndNId();
printf("Delete node %d\n", RndNId);
G->DelNode(RndNId);
IAssert(G->IsOk());
// dump the graph
printf("Graph (%d, %d)\n", G->GetNodes(), G->GetEdges());
for (PGraph::TObj::TNodeI NI = G->BegNI(); NI < G->EndNI(); NI++) {
printf(" %d: ", NI.GetId());
for (int e = 0; e < NI.GetDeg(); e++) {
printf(" %d", NI.GetNbrNId(e)); }
printf("\n");
}
// dump subgraph
TIntV NIdV;
for (PGraph::TObj::TNodeI NI = G->BegNI(); NI < G->EndNI(); NI++) {
if (NIdV.Len() < G->GetNodes()/2) { NIdV.Add(NI.GetId()); }
}
PGraph SubG = TSnap::GetSubGraph(G, NIdV);
//SubG->Dump();
// get NGraph
{ PNGraph NG = TSnap::ConvertGraph<PNGraph>(SubG);
NG->Dump();
IAssert(NG->IsOk());
TSnap::ConvertSubGraph<PNGraph>(G, NIdV)->Dump(); }
// get NEGraph
{ PNEGraph NEG = TSnap::ConvertGraph<PNEGraph>(SubG);
NEG->Dump();
IAssert(NEG->IsOk());
TSnap::ConvertSubGraph<PNGraph>(G, NIdV)->Dump(); }
TSnap::TestAnf<PUNGraph>();
return 0;
}
int main(int argc, char* argv[]) {
//// what type of graph do you want to use?
typedef PUNGraph PGraph; // undirected graph
//typedef PNGraph PGraph; // directed graph
//typedef PNEGraph PGraph; // directed multigraph
//typedef TPt<TNodeNet<TInt> > PGraph;
//typedef TPt<TNodeEdgeNet<TInt, TInt> > PGraph;
// this code is independent of what particular graph implementation/type we use
printf("Creating graph:\n");
PGraph G = PGraph::TObj::New();
for (int n = 0; n < 10; n++) {
G->AddNode(); // if no parameter is given, node ids are 0,1,...,9
}
G->AddEdge(0, 1);
for (int e = 0; e < 10; e++) {
const int NId1 = G->GetRndNId();
const int NId2 = G->GetRndNId();
if (G->AddEdge(NId1, NId2) != -2) {
printf(" Edge %d -- %d added\n", NId1, NId2); }
else {
printf(" Edge %d -- %d already exists\n", NId1, NId2); }
}
IAssert(G->IsOk());
//G->Dump();
// delete
PGraph::TObj::TNodeI NI = G->GetNI(0);
printf("Delete edge %d -- %d\n", NI.GetId(), NI.GetOutNId(0));
G->DelEdge(NI.GetId(), NI.GetOutNId(0));
const int RndNId = G->GetRndNId();
printf("Delete node %d\n", RndNId);
G->DelNode(RndNId);
IAssert(G->IsOk());
// dump the graph
printf("Graph (%d, %d)\n", G->GetNodes(), G->GetEdges());
for (PGraph::TObj::TNodeI NI = G->BegNI(); NI < G->EndNI(); NI++) {
printf(" %d: ", NI.GetId());
for (int e = 0; e < NI.GetDeg(); e++) {
printf(" %d", NI.GetNbrNId(e)); }
printf("\n");
}
// dump subgraph
TIntV NIdV;
for (PGraph::TObj::TNodeI NI = G->BegNI(); NI < G->EndNI(); NI++) {
if (NIdV.Len() < G->GetNodes()/2) { NIdV.Add(NI.GetId()); }
}
PGraph SubG = TSnap::GetSubGraph(G, NIdV);
//SubG->Dump();
// get UNGraph
{ PUNGraph UNG = TSnap::ConvertGraph<PUNGraph>(SubG);
UNG->Dump();
IAssert(UNG->IsOk());
TSnap::ConvertSubGraph<PNGraph>(G, NIdV)->Dump(); }
// get NGraph
{ PNGraph NG = TSnap::ConvertGraph<PNGraph>(SubG);
NG->Dump();
IAssert(NG->IsOk());
TSnap::ConvertSubGraph<PNGraph>(G, NIdV)->Dump(); }
// get NEGraph
{ PNEGraph NEG = TSnap::ConvertGraph<PNEGraph>(SubG);
NEG->Dump();
IAssert(NEG->IsOk());
TSnap::ConvertSubGraph<PNGraph>(G, NIdV)->Dump(); }
TSnap::TestAnf<PUNGraph>();
return 0;
}