PNGraph TNGraph::GetSmallGraph() {
PNGraph G = TNGraph::New();
for (int i = 0; i < 5; i++) { G->AddNode(i); }
G->AddEdge(0,1); G->AddEdge(1,2); G->AddEdge(0,2);
G->AddEdge(1,3); G->AddEdge(3,4); G->AddEdge(2,3);
return G;
}
void OnlyD3CEdges(PNGraph& dir_graph, PNGraph& d3c_graph, bool recip_edges) {
// Add all of the nodes into the new graph
for (TNGraph::TNodeI node = dir_graph->BegNI(); node < dir_graph->EndNI();
node++) {
int curr_node = node.GetId();
d3c_graph->AddNode(curr_node);
}
for (TNGraph::TNodeI node = dir_graph->BegNI(); node < dir_graph->EndNI();
node++) {
int curr_node = node.GetId();
auto curr_node_it = dir_graph->GetNI(curr_node);
for (int out_edge = 0; out_edge < curr_node_it.GetOutDeg(); ++out_edge) {
int out_node = curr_node_it.GetOutNId(out_edge);
for (int in_edge = 0; in_edge < curr_node_it.GetInDeg(); ++in_edge) {
int in_node = curr_node_it.GetInNId(in_edge);
if (out_node == in_node && !recip_edges) { continue; }
if (dir_graph->IsEdge(out_node, in_node) || recip_edges) {
if (!d3c_graph->IsEdge(out_node, in_node)) {
d3c_graph->AddEdge(out_node, in_node);
}
if (!d3c_graph->IsEdge(in_node, curr_node)) {
d3c_graph->AddEdge(in_node, curr_node);
}
if (!d3c_graph->IsEdge(curr_node, out_node)) {
d3c_graph->AddEdge(curr_node, out_node);
}
}
}
}
}
#ifdef _VERBOSE_
std::cout << "Original graph edge count: " << dir_graph->GetEdges() << std::endl
<< "D3C graph edge count: " << d3c_graph->GetEdges() << std::endl;
#endif
}
void OnlyD3CEdgesNoBack(PNGraph& dir_graph, PNGraph& d3c_graph) {
// Add all of the nodes into the new graph
for (TNGraph::TNodeI node = dir_graph->BegNI(); node < dir_graph->EndNI();
node++) {
int curr_node = node.GetId();
d3c_graph->AddNode(curr_node);
}
for (TNGraph::TNodeI node = dir_graph->BegNI(); node < dir_graph->EndNI();
node++) {
int curr_node = node.GetId();
auto curr_node_it = dir_graph->GetNI(curr_node);
for (int out_edge = 0; out_edge < curr_node_it.GetOutDeg(); ++out_edge) {
int out_node = curr_node_it.GetOutNId(out_edge);
for (int in_edge = 0; in_edge < curr_node_it.GetInDeg(); ++in_edge) {
int in_node = curr_node_it.GetInNId(in_edge);
if (dir_graph->IsEdge(out_node, in_node) && out_node != in_node) {
if (!d3c_graph->IsEdge(in_node, out_node) &&
!d3c_graph->IsEdge(curr_node, in_node) &&
!d3c_graph->IsEdge(out_node, curr_node)) {
if (!d3c_graph->IsEdge(out_node, in_node)) { d3c_graph->AddEdge(out_node, in_node); }
if (!d3c_graph->IsEdge(in_node, curr_node)) { d3c_graph->AddEdge(in_node, curr_node); }
if (!d3c_graph->IsEdge(curr_node, out_node)) { d3c_graph->AddEdge(curr_node, out_node); }
}
}
}
}
}
}
// Generate TNGraph
PNGraph GetTestTNGraph() {
PNGraph Graph = TNGraph::New();
for (int i = 0; i < 20; i++) {
Graph->AddNode(i);
}
for (int i = 0; i < 20; i++) {
Graph->AddEdge(i,(i+1) % 20);
Graph->AddEdge(i,(i+2) % 20);
Graph->AddEdge(i,(i+3) % 20);
}
return Graph;
}
// DyNetML format, loads all the networks in the file
TVec<PNGraph> LoadDyNetGraphV(const TStr& FNm) {
TXmlLx XmlLx(TFIn::New(FNm), xspTruncate);
TVec<PNGraph> GraphV;
THashSet<TStr> NIdStr;
while (XmlLx.GetSym()!=xsyEof) {
if (XmlLx.Sym==xsySTag && XmlLx.TagNm=="network") {
PNGraph G = TNGraph::New();
GraphV.Add(G);
XmlLx.GetSym();
while (XmlLx.TagNm=="link") {
TStr Str1, Val1, Str2, Val2;
XmlLx.GetArg(0, Str1, Val1); XmlLx.GetArg(1, Str2, Val2);
IAssert(Str1=="source" && Str2=="target");
NIdStr.AddKey(Val1); NIdStr.AddKey(Val2);
const int src=NIdStr.GetKeyId(Val1);
const int dst=NIdStr.GetKeyId(Val2);
if (! G->IsNode(src)) { G->AddNode(src); }
if (! G->IsNode(dst)) { G->AddNode(dst); }
G->AddEdge(src, dst);
XmlLx.GetSym();
}
}
}
return GraphV;
}
// Generate TNGraph
PNGraph TriadGetTestTNGraph() {
PNGraph Graph = TNGraph::New();
for (int i = 0; i < 6; i++) {
Graph->AddNode(i);
}
for (int i = 1; i < 6; i++) {
Graph->AddEdge(0, i);
}
Graph->AddEdge(2, 3);
Graph->AddEdge(1, 5);
Graph->AddEdge(2, 5);
return Graph;
}
PNGraph TGraphKey::GetNGraph() const {
PNGraph G = TNGraph::New();
for (int i = 0; i < GetNodes(); i++) G->AddNode(i);
for (int e = 0; e < GetEdges(); e++) {
G->AddEdge(EdgeV[e].Val1, EdgeV[e].Val2);
}
G->Defrag();
return G;
}
int TTop2FriendNet::GetRnd2WccSz(const double ProbPick2nd) const {
TCnComV CnComV;
PNGraph G = TNGraph::New();
for (TWgtNet::TNodeI NI = Net->BegNI(); NI < Net->EndNI(); NI++) {
if (NI.GetOutDeg() == 0) { continue; }
const int NId1 = NI.GetOutNId(TInt::Rnd.GetUniDevInt(NI.GetOutDeg()));
G->AddNode(NI.GetId());
G->AddNode(NId1);
G->AddEdge(NI.GetId(), NId1);
if (NI.GetOutDeg() > 1 && TInt::Rnd.GetUniDev() <= ProbPick2nd) {
int NId2 = NI.GetOutNId(TInt::Rnd.GetUniDevInt(NI.GetOutDeg()));
while (NId2 == NId1) { NId2 = NI.GetOutNId(TInt::Rnd.GetUniDevInt(NI.GetOutDeg())); }
G->AddNode(NId2);
G->AddEdge(NI.GetId(), NId2);
}
}
TCnCom::GetWccs(G, CnComV);
return CnComV[0].Len();
}
/// returns a perfect binary tree
PNGraph GetTree() {
PNGraph G = TNGraph::New();
for (int i = 0; i < 15; i++) {
G->AddNode(i);
}
for (int i = 1; i < 15; i++) {
G->AddEdge(i,i/2);
}
return G;
}
// Slashdot network
void MakeSlashdotNet(TStr InFNm, TStr OutFNm, TStr Desc) {
TSsParser Ss(InFNm, ssfTabSep);
PNGraph Graph = TNGraph::New();
TStrHash<TInt> StrSet(Mega(1), true);
while (Ss.Next()) {
const int SrcNId = StrSet.AddKey(Ss[0]);
if (! Graph->IsNode(SrcNId)) { Graph->AddNode(SrcNId); }
for (int dst = 2; dst < Ss.Len(); dst++) {
const int DstNId = StrSet.AddKey(Ss[dst]);
if (! Graph->IsNode(DstNId)) { Graph->AddNode(DstNId); }
Graph->AddEdge(SrcNId, DstNId);
}
}
PrintGraphStatTable(Graph, OutFNm, Desc);
}
void TGraphEnumUtils::GetGraph(uint64 graphId, int nodes, PNGraph &G) {
G->Clr();
//Add nodes;
for(int i=0; i<nodes; i++) G->AddNode(i);
//Add edges
for(int row=0; row<nodes; row++) {
for(int col=0; col<nodes; col++) {
int n = row*nodes+col;
//
uint64 bits = graphId >> n;
uint64 mask = 1;
if((bits & mask)==1) G->AddEdge(row, col);
}
}
}
void TGraphEnumUtils::GetIndGraph(const PNGraph &G, const TIntV &sg, PNGraph &indG) {
//Add nodes
for(int i=0; i<sg.Len(); i++) indG->AddNode(sg[i]);
//Add edges
for(int i=0; i<sg.Len(); i++) {
int nId = sg[i];
TNGraph::TNodeI nIt = G->GetNI(nId);
//
int deg = nIt.GetOutDeg();
for(int j=0; j<deg; j++) {
int dstId = nIt.GetNbrNId(j);
if(nId == dstId) continue;
//
if(indG->IsNode(dstId)) indG->AddEdge(nId, dstId);
}
}
}
void TGraphEnumUtils::GetNormalizedGraph(const PNGraph &G, PNGraph &nG) {
//Get bijective map from original node ids to normalized node ids(0,1,2,...)
THash<TInt,TInt> map;
GetNormalizedMap(G, map);
//Add nodes
for(int i=0; i<G->GetNodes(); i++) nG->AddNode(i);
//Add edges
for(TNGraph::TEdgeI eIt=G->BegEI(); eIt<G->EndEI(); eIt++) {
int srcId = eIt.GetSrcNId();
int dstId = eIt.GetDstNId();
//
int mSrcId = map.GetDat(srcId);
int mDstId = map.GetDat(dstId);
//
nG->AddEdge(mSrcId, mDstId);
}
}
// network cascade: add spurious edges
// for more details see "Correcting for Missing Data in Information Cascades" by E. Sadikov, M. Medina, J. Leskovec, H. Garcia-Molina. WSDM, 2011
PNGraph AddSpuriousEdges(const PUNGraph& Graph, const PNGraph& Casc, TIntH NIdTmH) {
TIntPrV EdgeV;
for (TNGraph::TNodeI NI = Casc->BegNI(); NI < Casc->EndNI(); NI++) {
TUNGraph::TNodeI GNI = Graph->GetNI(NI.GetId());
const int Tm = NIdTmH.GetDat(NI.GetId());
for (int i=0,j=0; i < GNI.GetOutDeg(); i++) {
const int Dst = GNI.GetOutNId(i);
if (NIdTmH.IsKey(Dst) && Tm<NIdTmH.GetDat(Dst) && ! NI.IsNbhNId(Dst)) {
EdgeV.Add(TIntPr(GNI.GetId(), Dst)); }
}
}
PNGraph NetCasc = TNGraph::New();
*NetCasc = *Casc;
for (int e = 0; e < EdgeV.Len(); e++) {
NetCasc->AddEdge(EdgeV[e].Val1, EdgeV[e].Val2); }
return NetCasc;
}
// simulate SI model cascade using infection probability Beta until the cascade stops or reaches size MxCascSz
PNGraph RunSICascade2(PUNGraph G, const double& Beta, const int& MxCascSz, TIntH& NIdInfTmH) {
PNGraph Casc = TNGraph::New();
const int StartNId = G->GetRndNId();
Casc->AddNode(StartNId);
NIdInfTmH.AddDat(StartNId, NIdInfTmH.Len());
TIntQ Q; Q.Push(StartNId);
while (! Q.Empty()) {
const TUNGraph::TNodeI NI = G->GetNI(Q.Top()); Q.Pop();
for (int i = 0; i < NI.GetOutDeg(); i++) {
if (TInt::Rnd.GetUniDev() < Beta && ! NIdInfTmH.IsKey(NI.GetOutNId(i))) {
Casc->AddNode(NI.GetOutNId(i));
NIdInfTmH.AddDat(NI.GetOutNId(i), NIdInfTmH.Len());
Casc->AddEdge(NI.GetId(), NI.GetOutNId(i));
if (Casc->GetNodes() == MxCascSz) { return Casc; }
Q.Push(NI.GetOutNId(i));
}
}
}
return Casc;
}
// simulate SI model cascade using infection probability Beta until the cascade reaches size CascSz
PNGraph RunSICascade(PUNGraph G, const double& Beta, const int& CascSz, TIntH& NIdInfTmH) {
PNGraph Casc = TNGraph::New();
const int StartId = G->GetRndNId();
Casc->AddNode(StartId);
NIdInfTmH.AddDat(StartId, NIdInfTmH.Len());
for (int X = 0; X < 10*CascSz; X++) {
TIntV CascNIdV; Casc->GetNIdV(CascNIdV);
for (int n = 0; n < CascNIdV.Len(); n++) {
const TUNGraph::TNodeI NI = G->GetNI(CascNIdV[n]);
for (int i = 0; i < NI.GetOutDeg(); i++) {
if (Casc->IsNode(NI.GetOutNId(i))) { continue; }
if (TInt::Rnd.GetUniDev() < Beta) {
Casc->AddNode(NI.GetOutNId(i));
NIdInfTmH.AddDat(NI.GetOutNId(i), NIdInfTmH.Len());
Casc->AddEdge(NI.GetId(), NI.GetOutNId(i));
if (Casc->GetNodes() == CascSz) { return Casc; }
}
}
}
}
return Casc;
}
PNGraph getFourHopGraph(const PNGraph& graph, int srcId, int dstId) {
PNGraph ret = PNGraph::New();
int shortPath = TSnap::GetShortPath(graph, srcId, dstId, true);
// printf("shortPath is %d\n", shortPath);
if (shortPath > 4) {
return ret;
}
std::set<int> nodeIdSet1;
getOutNeighborNodeIDs(graph, srcId, nodeIdSet1);
std::set<int> nodeIdSet2;
getInNeighborNodeIDs(graph, dstId, nodeIdSet2);
std::set<int> nodeIdSet;
nodeIdSet.insert(nodeIdSet1.begin(), nodeIdSet1.end());
nodeIdSet.insert(nodeIdSet2.begin(), nodeIdSet2.end());
// Add all nodes into new graph;
std::vector<int> nodeIdList;
for (std::set<int>::iterator setItr = nodeIdSet.begin(); setItr != nodeIdSet.end(); setItr++) {
ret->AddNode(*setItr);
nodeIdList.push_back(*setItr);
}
// Add all edges into new graph;
int nodeNum = nodeIdList.size();
for (int i = 0; i < nodeNum; ++i) {
for (int j = 0; j < nodeNum; ++j) {
if (i == j) continue;
if (graph->IsEdge(nodeIdList[i], nodeIdList[j], true)) {
ret->AddEdge(nodeIdList[i], nodeIdList[j]);
}
}
}
// printf("%d nodes in sub graph\n", ret->GetNodes());
// printf("%d edges in sub graph\n", ret->GetEdges());
// printf("%d hops\n", TSnap::GetShortPath(ret, srcId, dstId, true));
return ret;
}
int main(int argc, char* argv[]) {
// create a graph and save it
{ PNGraph Graph = TNGraph::New();
for (int i = 0; i < 10; i++) {
Graph->AddNode(i); }
for (int i = 0; i < 10; i++) {
Graph->AddEdge(i, TInt::Rnd.GetUniDevInt(10)); }
TSnap::SaveEdgeList(Graph, "graph.txt", "Edge list format"); }
// load a graph
PNGraph Graph;
Graph = TSnap::LoadEdgeList<PNGraph>("graph.txt", 0, 1);
// traverse nodes
for (TNGraph::TNodeI NI = Graph->BegNI(); NI < Graph->EndNI(); NI++) {
printf("NodeId: %d, InDegree: %d, OutDegree: %d\n", NI.GetId(), NI.GetInDeg(), NI.GetOutDeg());
printf("OutNodes: ");
for (int e = 0; e < NI.GetOutDeg(); e++) { printf(" %d", NI.GetOutNId(e)); }
printf("\nInNodes: ");
for (int e = 0; e < NI.GetInDeg(); e++) { printf(" %d", NI.GetInNId(e)); }
printf("\n\n");
}
// graph statistic
TSnap::PrintInfo(Graph, "Graph info");
PNGraph MxWcc = TSnap::GetMxWcc(Graph);
TSnap::PrintInfo(MxWcc, "Largest Weakly connected component");
// random graph
PNGraph RndGraph = TSnap::GenRndGnm<PNGraph>(100, 1000);
TGStat GraphStat(RndGraph, TSecTm(1), TGStat::AllStat(), "Gnm graph");
GraphStat.PlotAll("RndGraph", "Random graph on 1000 nodes");
// Forest Fire graph
{ TFfGGen ForestFire(false, 1, 0.35, 0.30, 1.0, 0.0, 0.0);
ForestFire.GenGraph(100);
PNGraph FfGraph = ForestFire.GetGraph(); }
// network
TPt<TNodeEDatNet<TStr, TStr> > Net = TNodeEDatNet<TStr, TStr>::New();
Net->AddNode(0, "zero");
Net->AddNode(1, "one");
Net->AddEdge(0, 1, "zero to one");
return 0;
}
void MakeLJNets(TStr InFNm, TStr OutFNm, TStr Desc){
TStrHash<TInt> StrSet(Mega(1), true);
for (int i = 1; i < 13; i++){
TStr tmp = "";
if (i < 10)
tmp = InFNm + "ljgraph.0" + TInt::GetStr(i);
else
tmp = InFNm + "ljgraph." + TInt::GetStr(i);
printf("%s\n",tmp());
TSsParser Ss(tmp, ssfTabSep);
PNGraph Graph = TNGraph::New();
while (Ss.Next()) {
const int SrcNId = StrSet.AddKey(Ss[0]);
if (! Graph->IsNode(SrcNId)) { Graph->AddNode(SrcNId); }
for (int dst = 2; dst < Ss.Len(); dst++) {
TStr ls,rs;
((TStr)Ss[dst]).SplitOnCh(ls,' ',rs);
if (ls == ">"){
const int DstNId = StrSet.AddKey(rs);
if (! Graph->IsNode(DstNId)) { Graph->AddNode(DstNId); }
Graph->AddEdge(SrcNId, DstNId);
}
}
}
if (i < 10)
OutFNm = "soc-lj-friends.0"+TInt::GetStr(i);
else
OutFNm = "soc-lj-friends."+TInt::GetStr(i);
PrintGraphStatTable(Graph, OutFNm, Desc);
}
}
void MakeLJGroupsNets(const TStr InFNm, TStr OutFNm, TStr Desc){
TStrHash<TInt> StrSetU(Mega(1), true);
TStrHash<TInt> StrSetG(Mega(1), true);
for (int i = 1; i < 13; i++){
TStr tmp = "";
if (i < 10)
tmp = InFNm + "ljgraph.0" + TInt::GetStr(i);
else
tmp = InFNm + "ljgraph." + TInt::GetStr(i);
printf("%s\n",tmp());
TSsParser Ss(tmp, ssfTabSep);
PNGraph Graph = TNGraph::New();
while (Ss.Next()) {
const int SrcNId = StrSetU.AddKey(Ss[0]);
if (! Graph->IsNode(SrcNId))
Graph->AddNode(SrcNId);
for (int dst = 2; dst < Ss.Len(); dst++) {
TStr ls,rs;
((TStr)Ss[dst]).SplitOnCh(ls,' ',rs);
if (ls == ">"){
const int DstNId = StrSetU.AddKey(rs);
if (! Graph->IsNode(DstNId)) { Graph->AddNode(DstNId); }
Graph->AddEdge(SrcNId, DstNId);
}
}
}
if (i < 10)
OutFNm = "soc-lj-friends.0"+TInt::GetStr(i);
else
OutFNm = "soc-lj-friends."+TInt::GetStr(i);
// PrintGraphStatTable(Graph, OutFNm, Desc);
}
for (int i = 5; i < 14; i++){
TStr tmp = "";
tmp = InFNm + "ljcomm." + TInt::GetStr(i);
printf("%s\n",tmp());
TSsParser Ss1(tmp, ssfTabSep);
PNGraph Graph1 = TNGraph::New();
PNGraph Graph2 = TNGraph::New();
TSsParser Ss(tmp, ssfTabSep);
while (Ss.Next()) {
const int SrcNId = StrSetU.AddKey(Ss[0]);
if (! Graph1->IsNode(SrcNId)) { Graph1->AddNode(SrcNId); }
if (! Graph2->IsNode(SrcNId)) { Graph2->AddNode(SrcNId); }
for (int dst = 2; dst < Ss.Len(); dst++) {
TStr ls,rs;
((TStr)Ss[dst]).SplitOnCh(ls,' ',rs);
const int DstNId = StrSetG.AddKey(rs) + 10000000;
if (! Graph1->IsNode(DstNId)) { Graph1->AddNode(DstNId); }
if (! Graph2->IsNode(DstNId)) { Graph2->AddNode(DstNId); }
if (ls == "<") // member
Graph1->AddEdge(SrcNId, DstNId);
else if (ls == ">") // watching
Graph2->AddEdge(SrcNId, DstNId);
}
}
OutFNm = "soc-lj-comm-";
TStr s = "";
if (i < 10)
s = "0";
PrintGraphStatTable(Graph1, OutFNm+"members-" + s + TInt::GetStr(i), Desc+" communities - members");
PrintGraphStatTable(Graph2, OutFNm+"watchers-"+ s + TInt::GetStr(i), Desc+" communities - watchers");
}
}
// 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);
}
/// returns a perfect binary tree plus one edge
PNGraph GetCircle() {
PNGraph G = GetTree();
G->AddEdge(7,2);
return G;
}
// 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);
}
int main(int argc, char* argv[]) {
string edge="";
const char *edge1 ="";
char * s1;
char * s2;
int from,to,a[2],j=0,RndFullDiam,SmallWorlFullDiam,PrefAttachFullDiam,i,t, FullDiam;
int64 triad;
double RndclusteringCoeff,PrefAttachclusteringCoeff,SmallWorldclusteringCoeff,clusteringCoeff;
double numStrongComp,RndEffDiam, RndAvgPL, SmallWorldEffDiam, SmallWorldAvgPL, PrefAttachEffDiam, PrefAttachAvgPL,EffDiam,AvgPL;
PNGraph Graph;
PUNGraph RandomGraph, PrefAttach, SmallWorld;
TIntPrV edges;
TIntFltH PRank;
TIntPrV Bridges;
TFltV EigV;
ofstream P1_measures,P2_measures,P3_measures,bridges;
P1_measures.open("P1_measures.txt");
P2_measures.open("P2_measures.txt");
P3_measures.open("P3_measures.txt");
bridges.open("Bridges.txt");
cout<<"\n loading SNAP Graph";
//Graph = TSnap::LoadEdgeList<PNGraph>("SnapGraph.txt",0,1);
Graph = TNGraph::New();
t = Graph->Empty();
for (i = 1; i < 78697; i++) {
cout<<"adding Node"<<i<<"\n";
Graph->AddNode(i);
}
//Reading the Annonymized List and creating the SNAP graph
ifstream gwfile;
gwfile.open("annonymized_edge_List.csv");
if(!gwfile) {
cout << "FAILED: file could not be opened" << endl << "Press enter to close.";
cin.get();
return 0;
}else
cout << "SUCCESSFULLY opened file!\n";
cout << "-------------------------\n\n\n";
while(getline(gwfile, edge,'\n')){
edge1=edge.c_str();
s1 = strtok ((char *)edge1,",");
s2 = strtok (NULL,",");
from = atoi(s1);
to = atoi(s2);
Graph->AddEdge(from,to);
cout<<"Adding Edge"<<from<<"->"<<to<<endl;
}
TSnap::SaveEdgeList(Graph, "SnapGraph.txt", "File saved as Tab separated");
cout<<"\n graph loaded";
PUNGraph UG = TSnap::ConvertGraph<PUNGraph>(Graph);
// P1 Measure
// Bridges
GetEdgeBridges(UG, Bridges);
bridges << "\nNumber of Bridges : " << Bridges.Len() <<endl;
for(int i = 0; i<Bridges.Len(); i++)
{
bridges << Bridges[i].Val1 << "->" << Bridges[i].Val2 <<endl;
}
// Triads
triad = TSnap::GetTriads(Graph);
P1_measures << "\nNumber of triads : " << triad <<endl;
// P2 Measure
// Global Clustering Coefficient
clusteringCoeff= TSnap::GetClustCf(Graph);
P2_measures << "\nGlobal Clustering Coefficient : " << clusteringCoeff<<"\n\n";
// Top 3 PageRank Values
GetPageRank(Graph,PRank);
P2_measures << "\nTop 3 Page Rank : " << "\n1st : "<< PRank[0].Val << "\n2nd : "<< PRank[1].Val << "\n3rd : "<< PRank[2].Val <<endl;
// Top 3 Eigenvector centrality Values
TSnap::GetEigVec(UG, EigV);
P2_measures << "\nTop 3 EigenVector Centralities: "<< "\n1st : "<< EigV[0].Val << "\n2nd : "<< EigV[1].Val << "\n3rd : "<< EigV[2].Val <<endl;
// P3 Models and Measures With 5000 Nodes and Average Degree 4 as that of Twitter Graph
// Creating Random graph
RandomGraph = TSnap::GenRndDegK(5000,4);
PrintGStats("Random Graph" , TSnap::ConvertGraph<PNGraph>(RandomGraph));
cout<<"\n Random graph created \n";
TSnap::SaveEdgeList(RandomGraph, "RandomGraph.tsv", "File saved as Tab separated");
TSnap::GetBfsEffDiam(RandomGraph, 5000, true, RndEffDiam, RndFullDiam, RndAvgPL);
RndclusteringCoeff= TSnap::GetClustCf(RandomGraph);
P3_measures << "\n\n\nRandom Graph with 5000 nodes and Average Degree 4: ";
P3_measures << "\nAverage Path Length : "<< RndAvgPL;
P3_measures << "\nClustering Coefficient : "<< RndclusteringCoeff;
// Creating Small World Model Graph
SmallWorld = TSnap::GenSmallWorld(5000,4,0.05);
PrintGStats("Small World Graph" , TSnap::ConvertGraph<PNGraph>(SmallWorld));
TSnap::SaveEdgeList(SmallWorld, "SmallWorld.tsv", "File saved as Tab separated");
cout<<"\n SmallWorld graph created \n";
TSnap::GetBfsEffDiam(SmallWorld, 5000, true, SmallWorldEffDiam, SmallWorlFullDiam, SmallWorldAvgPL);
SmallWorldclusteringCoeff= TSnap::GetClustCf(SmallWorld);
P3_measures << "\n\n\nSmall World Graph with 5000 nodes and Average Degree 4 and Beta .05: ";
P3_measures << "\nAverage Path Length : "<< SmallWorldAvgPL;
P3_measures << "\nClustering Coefficient : "<< SmallWorldclusteringCoeff;
// Creating Prefrential Attachment Model Graph
PrefAttach = TSnap::GenPrefAttach(5000,4);
PrintGStats("Prefrential Graph" , TSnap::ConvertGraph<PNGraph>(PrefAttach));
TSnap::SaveEdgeList(PrefAttach, "PrefrentialGraph.tsv", "File saved as Tab separated");
cout<<"\n PrefAttach graph created \n";
TSnap::GetBfsEffDiam(PrefAttach, 5000, true, PrefAttachEffDiam, PrefAttachFullDiam, PrefAttachAvgPL);
PrefAttachclusteringCoeff= TSnap::GetClustCf(PrefAttach);
cout<<"\n PrefAttach graph created";
P3_measures << "\n\n\nPrefrential Graph with 5000 nodes and Average Degree 4 : ";
P3_measures << "\nAverage Path Length : "<< PrefAttachAvgPL;
P3_measures << "\nClustering Coefficient : "<< PrefAttachclusteringCoeff;*/
// Diameter and Average Path Length
TSnap::GetBfsEffDiam(Graph, 78696, true, EffDiam, FullDiam,AvgPL);
P1_measures << "\nDiameter : " << FullDiam<<endl;
P1_measures << "\nAverage Path Length : " << AvgPL<<endl;
P1_measures.close();
P2_measures.close();
P3_measures.close();
bridges.close();
return 0;
}
// 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());
}
