void analyzeSimNetProps() {
const char *eFName = "epidemicRoutingNetEdges.txt";
const char *pFName = "prophetRoutingNetEdges.txt";
PNGraph eGraph = TSnap::LoadEdgeListStr<PNGraph>(eFName, 0, 1);
PNEGraph pGraph = TSnap::LoadEdgeListStr<PNEGraph>(pFName, 0, 1);
PNGraph randGraph = TSnap::GenRndGnm<PNGraph>(eGraph->GetNodes(), eGraph->GetEdges(), true, TInt::Rnd);
chdir("dot");
for (int i=0; i<10; i++) {
TIntV NIdV;
for (int j = 0; j < 10; j++) {
int randNode = eGraph->GetRndNId();
NIdV.AddUnique(randNode);
}
// Plot the mesage propagtion in Endroy-Renyi graphs
PNGraph randFlow = TSnap::GetSubGraph<PNGraph>(randGraph, NIdV);
char randf[50]; sprintf(randf,"%d-erdos.dot",i);
TSnap::SaveGViz(randFlow, randf, TStr("Edros-Renyi random graph"));
// Now plot epidemic routing
PNGraph epidemicFlow = TSnap::GetSubGraph<PNGraph>(eGraph, NIdV);
char epf[50]; sprintf(epf,"%d-epidemic.dot",i);
TSnap::SaveGViz(epidemicFlow, epf, TStr("Epidemic routing"));
}
}
// Test node, edge creation
void ManipulateNodesEdges() {
int NNodes = 10000;
int NEdges = 100000;
const char *FName = "demo.graph.dat";
PNGraph Graph;
PNGraph Graph1;
PNGraph Graph2;
int i;
int n;
int NCount;
int ECount1;
int ECount2;
int x,y;
bool t;
Graph = TNGraph::New();
t = Graph->Empty();
// create the nodes
for (i = 0; i < NNodes; i++) {
Graph->AddNode(i);
}
t = Graph->Empty();
n = Graph->GetNodes();
// create random edges
NCount = NEdges;
while (NCount > 0) {
x = rand() % NNodes;
y = rand() % NNodes;
// Graph->GetEdges() is not correct for the loops (x == y),
// skip the loops in this test
if (x != y && !Graph->IsEdge(x,y)) {
n = Graph->AddEdge(x, y);
NCount--;
}
}
PrintGStats("ManipulateNodesEdges:Graph",Graph);
// get all the nodes
NCount = 0;
for (TNGraph::TNodeI NI = Graph->BegNI(); NI < Graph->EndNI(); NI++) {
NCount++;
}
// get all the edges for all the nodes
ECount1 = 0;
for (TNGraph::TNodeI NI = Graph->BegNI(); NI < Graph->EndNI(); NI++) {
for (int e = 0; e < NI.GetOutDeg(); e++) {
ECount1++;
}
}
// get all the edges directly
ECount2 = 0;
for (TNGraph::TEdgeI EI = Graph->BegEI(); EI < Graph->EndEI(); EI++) {
ECount2++;
}
printf("ManipulateNodesEdges:Graph, nodes %d, edges1 %d, edges2 %d\n",
NCount, ECount1, ECount2);
// assignment
Graph1 = TNGraph::New();
*Graph1 = *Graph;
PrintGStats("ManipulateNodesEdges:Graph1",Graph1);
// save the graph
{
TFOut FOut(FName);
Graph->Save(FOut);
FOut.Flush();
}
// load the graph
{
TFIn FIn(FName);
Graph2 = TNGraph::Load(FIn);
}
PrintGStats("ManipulateNodesEdges:Graph2",Graph2);
// remove all the nodes and edges
for (i = 0; i < NNodes; i++) {
n = Graph->GetRndNId();
Graph->DelNode(n);
}
PrintGStats("ManipulateNodesEdges:Graph",Graph);
Graph1->Clr();
PrintGStats("ManipulateNodesEdges:Graph1",Graph1);
}
// Test node, edge creation
TEST(TNGraph, ManipulateNodesEdges) {
int NNodes = 10000;
int NEdges = 100000;
const char *FName = "test.graph.dat";
PNGraph Graph;
PNGraph Graph1;
PNGraph Graph2;
int i;
int n;
int NCount;
int x,y;
int Deg, InDeg, OutDeg;
Graph = TNGraph::New();
EXPECT_EQ(1,Graph->Empty());
// create the nodes
for (i = 0; i < NNodes; i++) {
Graph->AddNode(i);
}
EXPECT_EQ(0,Graph->Empty());
EXPECT_EQ(NNodes,Graph->GetNodes());
// create random edges
NCount = NEdges;
while (NCount > 0) {
x = (long) (drand48() * NNodes);
y = (long) (drand48() * NNodes);
// Graph->GetEdges() is not correct for the loops (x == y),
// skip the loops in this test
if (x != y && !Graph->IsEdge(x,y)) {
n = Graph->AddEdge(x, y);
NCount--;
}
}
EXPECT_EQ(NEdges,Graph->GetEdges());
EXPECT_EQ(0,Graph->Empty());
EXPECT_EQ(1,Graph->IsOk());
for (i = 0; i < NNodes; i++) {
EXPECT_EQ(1,Graph->IsNode(i));
}
EXPECT_EQ(0,Graph->IsNode(NNodes));
EXPECT_EQ(0,Graph->IsNode(NNodes+1));
EXPECT_EQ(0,Graph->IsNode(2*NNodes));
// nodes iterator
NCount = 0;
for (TNGraph::TNodeI NI = Graph->BegNI(); NI < Graph->EndNI(); NI++) {
NCount++;
}
EXPECT_EQ(NNodes,NCount);
// edges per node iterator
NCount = 0;
for (TNGraph::TNodeI NI = Graph->BegNI(); NI < Graph->EndNI(); NI++) {
for (int e = 0; e < NI.GetOutDeg(); e++) {
NCount++;
}
}
EXPECT_EQ(NEdges,NCount);
// edges iterator
NCount = 0;
for (TNGraph::TEdgeI EI = Graph->BegEI(); EI < Graph->EndEI(); EI++) {
NCount++;
}
EXPECT_EQ(NEdges,NCount);
// node degree
for (TNGraph::TNodeI NI = Graph->BegNI(); NI < Graph->EndNI(); NI++) {
Deg = NI.GetDeg();
InDeg = NI.GetInDeg();
OutDeg = NI.GetOutDeg();
EXPECT_EQ(Deg,InDeg+OutDeg);
}
// assignment
Graph1 = TNGraph::New();
*Graph1 = *Graph;
EXPECT_EQ(NNodes,Graph1->GetNodes());
EXPECT_EQ(NEdges,Graph1->GetEdges());
EXPECT_EQ(0,Graph1->Empty());
EXPECT_EQ(1,Graph1->IsOk());
// saving and loading
{
TFOut FOut(FName);
Graph->Save(FOut);
FOut.Flush();
}
{
TFIn FIn(FName);
Graph2 = TNGraph::Load(FIn);
}
EXPECT_EQ(NNodes,Graph2->GetNodes());
EXPECT_EQ(NEdges,Graph2->GetEdges());
EXPECT_EQ(0,Graph2->Empty());
EXPECT_EQ(1,Graph2->IsOk());
// remove all the nodes and edges
for (i = 0; i < NNodes; i++) {
n = Graph->GetRndNId();
Graph->DelNode(n);
}
EXPECT_EQ(0,Graph->GetNodes());
EXPECT_EQ(0,Graph->GetEdges());
EXPECT_EQ(1,Graph->IsOk());
EXPECT_EQ(1,Graph->Empty());
Graph1->Clr();
EXPECT_EQ(0,Graph1->GetNodes());
EXPECT_EQ(0,Graph1->GetEdges());
EXPECT_EQ(1,Graph1->IsOk());
EXPECT_EQ(1,Graph1->Empty());
}
// Demos BFS functions on directed graph that is not fully connected
void DemoBFSDirectedRandom() {
PNGraph G = TNGraph::New();
TStr FName = TStr::Fmt("%s/sample_bfsdfs_ngraph.txt", DIRNAME);
// Create benchmark graph, initially visually to confirm values are correct
const int NNodes = 30;
G = GenRndGnm<PNGraph>(NNodes, NNodes*2);
// Add some more random edges
for (int i = 0; i < 10; i++) {
TInt Src, Dst;
do {
Src = G->GetRndNId();
Dst = G->GetRndNId();
}
while (Src == Dst || G->IsEdge(Src, Dst));
G->AddEdge(Src, Dst);
}
// Add isolated component
G->AddNode(NNodes);
G->AddNode(NNodes+1);
G->AddNode(NNodes+2);
G->AddEdge(NNodes, NNodes+1);
G->AddEdge(NNodes+1, NNodes+2);
G->AddEdge(NNodes+2, NNodes+1);
printf("G->GetNodes() = %d, G->GetEdges() = %d\n", G->GetNodes(), G->GetEdges());
// SaveEdgeList(G, FName);
// G = LoadEdgeList<PNGraph>(FName);
TIntStrH NodeLabelH;
for (int i = 0; i < G->GetNodes(); i++) {
NodeLabelH.AddDat(i, TStr::Fmt("%d", i));
}
DrawGViz(G, gvlDot, TStr::Fmt("%s/sample_bfsdfs_ngraph.png", DIRNAME), "Sample BFS Graph", NodeLabelH);
printf("G->GetNodes() = %d, G->GetEdges() = %d\n", G->GetNodes(), G->GetEdges());
TIntV NIdV;
int StartNId, Hop, Nodes;
// for (int IsDir = 0; IsDir < 2; IsDir++) {
int IsDir = 1;
printf("IsDir = %d:\n", IsDir);
StartNId = 11;
Hop = 1;
Nodes = GetNodesAtHop(G, StartNId, Hop, NIdV, IsDir);
printf("Nodes = %d, GetNodesAtHop NIdV.Len() = %d\n", Nodes, NIdV.Len());
for (int i = 0; i < NIdV.Len(); i++) {
printf("NIdV[%d] = %d\n", i, NIdV[i].Val);
}
printf("Nodes == 2");
printf("NIdV.Len() == 2");
TIntPrV HopCntV;
Nodes = GetNodesAtHops(G, StartNId, HopCntV, IsDir);
printf("Nodes = %d, GetNodesAtHops HopCntV.Len() = %d\n", Nodes, HopCntV.Len());
printf("Nodes == 10");
printf("HopCntV.Len() == 10");
// for (int N = 0; N < HopCntV.Len(); N++) {
// printf("HopCntV[%d] = (%d, %d)\n", N, HopCntV[N].Val1.Val, HopCntV[N].Val2.Val);
// }
int Length, SrcNId, DstNId;
SrcNId = 11;
DstNId = G->GetNodes() - 1;
Length = GetShortPath(G, SrcNId, DstNId, IsDir);
printf("%d -> %d: SPL Length = %d\n", SrcNId, DstNId, Length);
SrcNId = 11;
DstNId = 27;
Length = GetShortPath(G, SrcNId, DstNId, IsDir);
printf("%d -> %d: SPL Length = %d\n", SrcNId, DstNId, Length);
TIntH NIdToDistH;
int MaxDist = 9;
Length = GetShortPath(G, SrcNId, NIdToDistH, IsDir, MaxDist);
// for (int i = 0; i < min(5,NIdToDistH.Len()); i++) {
// printf("NIdToDistH[%d] = %d\n", i, NIdToDistH[i].Val);
// }
TInt::Rnd.PutSeed(0);
int FullDiam;
double EffDiam, AvgSPL;
int NTestNodes = G->GetNodes() / 2;
FullDiam = GetBfsFullDiam(G, NTestNodes, IsDir);
printf("FullDiam = %d\n", FullDiam);
EffDiam = GetBfsEffDiam(G, NTestNodes, IsDir);
printf("EffDiam = %.3f\n", EffDiam);
EffDiam = GetBfsEffDiam(G, NTestNodes, IsDir, EffDiam, FullDiam);
printf("EffDiam = %.3f, FullDiam = %d\n", EffDiam, FullDiam);
EffDiam = GetBfsEffDiam(G, NTestNodes, IsDir, EffDiam, FullDiam, AvgSPL);
printf("EffDiam = %.3f, FullDiam = %d, AvgDiam = %.3f\n", EffDiam, FullDiam, AvgSPL);
TIntV SubGraphNIdV;
SubGraphNIdV.Add(8);
SubGraphNIdV.Add(29);
SubGraphNIdV.Add(16);
SubGraphNIdV.Add(0);
SubGraphNIdV.Add(19);
SubGraphNIdV.Add(17);
SubGraphNIdV.Add(26);
SubGraphNIdV.Add(14);
SubGraphNIdV.Add(10);
SubGraphNIdV.Add(24);
SubGraphNIdV.Add(27);
SubGraphNIdV.Add(2);
SubGraphNIdV.Add(18);
EffDiam = GetBfsEffDiam(G, NTestNodes, SubGraphNIdV, IsDir, EffDiam, FullDiam);
printf("For subgraph: EffDiam = %.4f, FullDiam = %d\n", EffDiam, FullDiam);
}