def gen_D(Pi, V_exo, theta2):
"""
Returns a triplet of three snap graphs:
D = opportunity graph with robust links removed.
Pi_minus = subgraph of Pi without robustly absent potential links.
Pi_exo = subgraph of Pi with only robust links.
NB: This function is specific to the joint surplus used in our simulations.
Pi = opportunity graph (in our case, the output of gen_RGG).
V_exo = 'exogenous' part of joint surplus (output of gen_V_exo).
theta2 = transitivity parameter (theta[2]).
"""
N = V_exo.shape[0]
D = snap.ConvertGraph(snap.PUNGraph, Pi)
Pi_minus = snap.ConvertGraph(snap.PUNGraph, Pi)
Pi_exo = snap.GenRndGnm(snap.PUNGraph, N, 0)
for edge in Pi.Edges():
i = min(edge.GetSrcNId(), edge.GetDstNId())
j = max(edge.GetSrcNId(), edge.GetDstNId())
if V_exo[i, j] + min(theta2, 0) > 0:
D.DelEdge(i, j)
Pi_exo.AddEdge(i, j)
if V_exo[i, j] + max(theta2, 0) <= 0:
D.DelEdge(i, j)
Pi_minus.DelEdge(i, j)
return (D, Pi_minus, Pi_exo)
def tuntoall():
FIn = snap.TFIn(NW.twitter_binary)
G = snap.TUNGraph.Load(FIn)
t0 = t()
# convert undirected graph to directed
GOut = snap.ConvertGraph(snap.PNGraph, G)
t1 = reportTime(t0, "convert TUNGRAPH to TNGRAPH")
# convert directed graph to a network
GOut = snap.ConvertGraph(snap.PNEANet, G)
reportTime(t1, "convert TUNGRAPH to TNEANet")
def get_connected_component(graph):
if isinstance(graph, snap.PNGraph):
lcc = snap.GetMxScc(graph)
# renumber the node numbers from 0 to the size-1
lcc = snap.ConvertGraph(snap.PNGraph, lcc, True)
elif isinstance(graph, snap.PUNGraph):
lcc = snap.GetMxWcc(graph)
# renumber the node numbers from 0 to the size-1
lcc = snap.ConvertGraph(snap.PUNGraph, lcc, True)
else:
raise NotAGraphError(graph)
return lcc
def main ():
import json
import snap
import graphviz
import matplotlib.pyplot as plt
import numpy as np
import xlrd
#-----------------
#The common area
rumor_number = "21"
path_input = 'D:\\Papers\\Social Network Mining\\Analysis_of_Rumor_Dataset\\Step 18\\Rumor_'+ rumor_number +'\\Input\\'
workbook_input1_D = xlrd.open_workbook(path_input + 'DATASET.xlsx', on_demand = True)
path_jsonl = 'D:\\Papers\\Social Network Mining\\Analysis_of_Rumor_Dataset\\Step 18\\Rumor_'+ rumor_number +'\\Input\\Rumor_' + rumor_number + '.jsonl'
path_graph = 'D:\\Papers\\Social Network Mining\\Analysis_of_Rumor_Dataset\\Step 18\\Rumor_'+ rumor_number +'\\Input\\Rumor_' + rumor_number + '.graph'
path_output = 'D:\\Papers\\Social Network Mining\\Analysis_of_Rumor_Dataset\\Step 18\\Rumor_'+ rumor_number +'\\Output\\'
FIn = snap.TFIn(path_graph)
G_Directed = snap.TNGraph.Load(FIn)
G_Directed_with_Attributes = snap.ConvertGraph(snap.PNEANet, G_Directed) #Convert Directed Graph to Directed Graph with attributes: it means now we can assign attributes to the graph nodes
G_Directed_with_Attributes = Get_Graph_with_Attributes_New (path_jsonl, G_Directed_with_Attributes, workbook_input1_D)
#-----------------
#The specific area
snap.PrintInfo(G_Directed_with_Attributes, "Python type PNEANet", path_output + "S18_5_Output.txt", False)
def set_degree_proportional_thresholds(graph, value):
g = snap.ConvertGraph(snap.PNEANet, graph)
print("Number of graph nodes: ", g.GetNodes())
for n in g.Nodes():
g.AddIntAttrDatN(n.GetId(),
math.floor(n.GetDeg() * value) + 1, "threshold")
return g
def set_random_threshold(graph):
g = snap.ConvertGraph(snap.PNEANet, graph)
for n in g.Nodes():
max = n.GetDeg() + int((n.GetDeg() / 100) * 20 + 1)
random_value = random.randint(0, max)
g.AddIntAttrDatN(n.GetId(), random_value, "threshold")
#print("Threshold of the node ", n.GetId()," with value", g.GetIntAttrDatN(n.GetId(),"threshold"))
return g
def transform_directed_to_undirected():
GUn = snap.ConvertGraph(snap.PUNGraph, G)
snap.PrintInfo(GUn, "Tweets UN stats", "Tweets_UN_info.txt", False)
f = open('Tweets_UN_info.txt', 'r')
file_contents = f.read()
#print(file_contents)
f.close()
return GUn
def proportional_to_the_degree_threshold_assignment(g):
g = snap.ConvertGraph(snap.PNEANet, g)
for n in g.Nodes():
deg = n.GetDeg()
value = 5
if deg > 0:
value = int((1 / (deg + value)) * (g.GetEdges() / g.GetNodes()))
g.AddIntAttrDatN(n.GetId(), value, "threshold")
return g
def join_subgraphs_EB(subgraph1, subgraph2, nmE, nmN):
c = snap.ConvertGraph(type(subgraph2), subgraph2)
if nmN:
c.AddNode(nmN)
c.AddEdge(nmE[0], nmE[1])
return c
def snowball_sample(G, num_waves, seeds):
"""
Parameters:
G - SNAP graph or network to sample frpm
num_waves - number of snowball waves
seeds - SNAP vector (TIntV) of seeds (node ids) to start snowball sample
from
Return value:
SNAP network (TNEANet) snowball sampled from G with each node having
an integer "zone" attribute for snowball sampling zone
(0=seed, 1=first wave, etc.)
[TNEANet needed to allow zone attribute, not actually using multigraph
capability].
Note directions on directed graph are ignored - can sample in undirected
or directed graph.
"""
assert (len(seeds) == len(set(seeds))) # no duplicate node ids
# It seems like GetSubGraph does not preserve node attributse
# so instead of adding attributes ot nodes on N, make a Python
# dictionary mapping node ids to zone and then add them back
# ass attributes on the subgraph (node ids are preserved so we
# can do this)
zonedict = dict() # map nodeid : zone
N = snap.ConvertGraph(snap.PNEANet, G) # copy graph/network G to network N
nodes = set(seeds) # will accumulate all nodes (including seeds) here
for seed in seeds:
zonedict[seed] = 0 # seed nodes are zone 0
newNodes = set(nodes)
for i in range(num_waves):
wave = i + 1
#print 'wave',wave
for node in set(newNodes):
neighbours = snap.TIntV()
snap.GetNodesAtHop(G, node, 1, neighbours,
False) # neighbours of node
newNeighbours = set(
neighbours) - nodes # neighbours that are not already in nodes
for node in newNeighbours:
if not zonedict.has_key(node):
zonedict[node] = wave
newNodes.update(
newNeighbours
) # newNodes gets set union of itslf and newNeighbours
nodes.update(newNodes)
# have to convert nodes set into TIntV for use in SNAP
NodeVec = snap.TIntV()
for node in nodes:
NodeVec.Add(node)
sampleN = snap.GetSubGraph(N, NodeVec)
# now put the zones as attributes on the subgraph nodes (which depends
# on nodeids being preserved in the subgraph)
sampleN.AddIntAttrN("zone", -1) # add zone attribute init to -1
for (nodeid, zone) in zonedict.iteritems():
sampleN.AddIntAttrDatN(nodeid, zone, "zone")
return sampleN
def getEdgeBridges(network):
UGraph = snap.ConvertGraph(snap.PUNGraph, network)
EdgeV = snap.TIntPrV()
snap.GetEdgeBridges(UGraph, EdgeV)
for edge in EdgeV:
print("edge: (%d, %d)" % (edge.GetVal1(), edge.GetVal2()))
print(len(EdgeV))
return EdgeV
def estimate4SubgraphFrequencies(Network, connected=True):
subgraph_counts = np.zeros(10)
# 0 -> 0 edges
# 1 -> 1 edge
# 2 -> 2 adjacent edges
# 3 -> 2 non-adjacent edges
# 4 -> 3-star
# 5 -> 3-path
# 6 -> tailed triangle
# 7 -> 4-cycle
# 8 -> chordal 4-cycle
# 9 -> 4-clique
G = snap.ConvertGraph(snap.PUNGraph, Network)
for _ in range(num_samples):
sG = snap.GetRndSubGraph(G, 4)
num_edges = sG.GetEdges()
if connected and num_edges < 3:
continue
if num_edges == 0:
subgraph_counts[0] += 1
elif num_edges == 1:
subgraph_counts[1] += 1
elif num_edges == 2:
maxdeg = sG.GetNI(snap.GetMxDegNId(sG)).GetDeg()
if maxdeg == 2:
subgraph_counts[2] += 1
else:
subgraph_counts[3] += 1
elif num_edges == 3:
maxdeg = sG.GetNI(snap.GetMxDegNId(sG)).GetDeg()
if maxdeg == 3:
subgraph_counts[4] += 1
else:
subgraph_counts[5] += 1
elif num_edges == 4:
maxdeg = sG.GetNI(snap.GetMxDegNId(sG)).GetDeg()
if maxdeg == 3:
subgraph_counts[6] += 1
else:
subgraph_counts[7] += 1
elif num_edges == 5:
subgraph_counts[8] += 1
else:
subgraph_counts[9] += 1
return list(subgraph_counts / sum(subgraph_counts))
def community_detection(input, output):
print("Loading graph...")
FIn = snap.TFIn(input)
graph = snap.TNGraph.Load(FIn)
ugraph = snap.ConvertGraph(snap.PUNGraph, graph)
print("Performing community detection...")
CmtyV = snap.TCnComV()
modularity = snap.CommunityCNM(ugraph, CmtyV)
print("Modularity:", modularity)
with open(output, "w") as file:
for Cmty in CmtyV:
file.write(repr([NI for NI in Cmty]))
file.write("\n")
def deferred_decision(G, probs, dist):
graph = snap.ConvertGraph(snap.PUNGraph, G)
for e in graph.Edges():
if dist == 'uniform':
x = np.random.uniform()
else:
x = np.random.normal()
src = e.GetSrcNId()
dst = e.GetDstNId()
if x < probs[(src, dst)]:
graph.DelEdge(src, dst)
return graph
def set_median_threshold(graph):
g = snap.ConvertGraph(snap.PNEANet, graph)
data = []
print("Number of graph nodes: ", g.GetNodes())
count = 0
for n in g.Nodes():
data.append(n.GetDeg())
value = median(data)
print("The median value is: ", value)
for n in g.Nodes():
g.AddIntAttrDatN(n.GetId(), value, "threshold")
print("Threshold of the node ", n.GetId(), " with value ",
g.GetIntAttrDatN(n.GetId(), "threshold"))
if n.GetDeg() < value:
count += 1
print("Number of nodes below the median: ", count)
return g
def visualiseGraph(rowData, activityCodeList, fileName, title, undirect_conversion=False):
columnList = generateTransition(activityCodeList)
G1 = snap.TNGraph.New()
checkActivityList = []
for i in columnList:
if i[1] in rowData.index:
if rowData[i[1]] > 0:
if i[0][0] not in checkActivityList:
G1.AddNode(i[0][0])
checkActivityList.append(i[0][0])
if i[0][1] not in checkActivityList:
G1.AddNode(i[0][1])
checkActivityList.append(i[0][1])
G1.AddEdge(i[0][0],i[0][1])
if undirect_conversion:
G1 = snap.ConvertGraph(snap.PUNGraph,G1)
snap.DrawGViz(G1, snap.gvlDot, "graphs/" + "/" + fileName + ".png", title, True)
def estimate3SubgraphFrequencies(Network):
G = snap.ConvertGraph(snap.PNGraph, Network)
subgraph_counts = np.zeros(7)
# 0 -> 0 edges
# 1 -> 1 edge
# 2 -> 2 edges to same node
# 3 -> 2 edges from same node
# 4 -> 2 edges though one node
# 5 -> 3 edge cycle
# 6 -> 3 edge, not cycle
for _ in range(num_samples):
sG = snap.GetRndSubGraph(G, 3)
num_edges = sG.GetEdges()
if num_edges == 0:
subgraph_counts[0] += 1
elif num_edges == 1:
subgraph_counts[1] += 1
elif num_edges == 2:
max_indeg = sG.GetNI(snap.GetMxInDegNId(sG)).GetInDeg()
max_outdeg = sG.GetNI(snap.GetMxOutDegNId(sG)).GetOutDeg()
if max_indeg == 2:
subgraph_counts[2] += 1
elif max_outdeg == 2:
subgraph_counts[3] += 1
else:
subgraph_counts[4] += 1
else:
max_indeg = sG.GetNI(snap.GetMxInDegNId(sG)).GetInDeg()
if max_indeg == 1:
subgraph_counts[5] += 1
else:
subgraph_counts[6] += 1
return list(subgraph_counts / sum(subgraph_counts))
def girvin_neuman_profile_extract(rowData, activityCodeList, index,week):
columnList = generateTransition(activityCodeList)
G1 = snap.TNGraph.New()
checkActivityList = []
# for node1 in activityCodeList:
# for node2 in activityCodeList:
# a = node1[1] + '-' + node2[1]
# if a in rowData.index:
# if node1[0] not in checkActivityList:
# G1.AddNode(node1[0])
# checkActivityList.append(node1[0])
# if node2[0] not in checkActivityList:
# G1.AddNode(node2[0])
# checkActivityList.append(node2[0])
for i in columnList:
if i[1] in rowData.index:
if rowData[i[1]] > 0:
if i[0][0] not in checkActivityList:
G1.AddNode(i[0][0])
checkActivityList.append(i[0][0])
if i[0][1] not in checkActivityList:
G1.AddNode(i[0][1])
checkActivityList.append(i[0][1])
G1.AddEdge(i[0][0],i[0][1])
G1_undirect = snap.ConvertGraph(snap.PUNGraph,G1)
# snap.DrawGViz(G1_undirect, snap.gvlDot, "graphs/week/" + str(week) + "/" + index + ".png", index)
CmtyV = snap.TCnComV()
modularity = snap.CommunityGirvanNewman(G1_undirect, CmtyV)
noOfCluster = len(CmtyV)
clusterList = []
for Cmty in CmtyV:
community = []
for NI in Cmty:
community.append(NI)
clusterList.append(community)
return [index, modularity, noOfCluster, clusterList]
#def getCentralities(network):
network = loadGraph()
nameToNId = {}
uIdToNId = {}
for n in network.Nodes():
id = n.GetId()
nameToNId[network.GetStrAttrDatN(id, 'name').decode('utf-8')] = id
infile = codecs.open('csv/dblpusersaff.csv', 'r', 'utf-8')
lines = infile.read().splitlines()
infile.close()
for line in lines:
tokens = line.split('||')
if tokens[2] != '':
nId = nameToNId[tokens[1]]
uIdToNId[int(tokens[0])] = nId
graph = snap.ConvertGraph(snap.PUNGraph, network)
degCenters = {}
closeCenters = {}
pageRanks = snap.TIntFltH()
eigenCenters = snap.TIntFltH()
# btwnCenters = snap.TIntFltH()
# edgeHash = snap.TIntPrFltH()
print('Running PageRank...')
snap.GetPageRank(graph, pageRanks)
print('Running Eigenvector centrality...')
snap.GetEigenVectorCentr(graph, eigenCenters)
# print('Running Betweeness...')
# snap.GetBetweennessCentr(graph, btwnCenters, edgeHash)
print('Running Degree and Closeness...')
for uId, nId in uIdToNId.iteritems():
print uId, nId
def set_fixed_threshold(graph, value):
g = snap.ConvertGraph(snap.PNEANet, graph)
for n in g.Nodes():
g.AddIntAttrDatN(n.GetId(), value, "threshold")
return g
for x in parsed:
vid = x.videoid
for v in list(x.related) + [vid]:
if v not in self.nodeid:
self.nodeid[v] = self.size
self.videoid[self.size] = v
self.size += 1
#filenames = [ "0301/{}.txt".format(i) for i in range(0, 4) ]
#data = Data(filenames)
#graph = make_graph(data)
#save_graph_data(data, graph, "try")
data, graph = load_graph_data("try")
Graph = snap.ConvertGraph(snap.PUNGraph, graph)
NId1 = snap.GetMxDegNId(Graph)
NIdToDistH = snap.TIntH()
shortestPath = snap.GetShortPath(Graph, NId1, NIdToDistH)
shortestDist = {}
for item in NIdToDistH:
shortestDist[item] = NIdToDistH[item]
PRankH = snap.TIntFltH()
snap.GetPageRank(Graph, PRankH)
simRanks = {}
def simRank(Graph, nIters, gamma):
def algorithm(G, D):
#Pruning Step
P = 1
T = 0
while P == 1:
P = 0
for NI in G.Nodes():
NID = NI.GetId()
d = NI.GetDeg()
if d <= D or d > G.GetNodes() - 2:
if d <= D and d > 1:
for i in range(d - 1):
for j in range(i + 1, d):
a = NI.GetNbrNId(i)
b = NI.GetNbrNId(j)
if G.IsEdge(a, b):
T = T + 1
if d > D and d > G.GetNodes() - 2:
T = T + G.GetEdges() - NI.GetDeg()
P = 1
G.DelNode(NID)
#Hierarchical Clustering Step
if G.GetNodes() > 5:
H = snap.ConvertGraph(type(G), G)
S = []
i = 0
while H.GetNodes() > 0:
S.append([])
S[i].append(snap.GetMxDegNId(H))
j = 1
TTT = True
while TTT:
s = snap.TIntV()
snap.GetNodesAtHop(H, S[i][0], j, s, True)
if len(s) != 0:
S[i].append(s)
j = j + 1
else:
TTT = False
H.DelNode(S[i][0])
for j in range(1, len(S[i])):
for nodeID in S[i][j]:
H.DelNode(nodeID)
i = i + 1
subgraphs = [[] for x in range(len(S))]
#Counting Step
for i in range(len(S)):
for j in range(1, len(S[i])):
G01 = snap.ConvertSubGraph(snap.PUNGraph, G, S[i][j])
subgraphs[i].append(G01)
T = T + subgraphs[i][0].GetEdges()
G.DelNode(S[i][0])
for i in range(len(S)):
for j in range(1, len(S[i])):
for upnodeID in S[i][j]:
U = []
D = []
for t in range(G.GetNI(upnodeID).GetDeg()):
a = G.GetNI(upnodeID).GetNbrNId(t)
if j < len(S[i]) - 1:
if subgraphs[i][j].IsNode(a):
U.append(a)
if j > 1:
if subgraphs[i][j - 2].IsNode(a):
D.append(a)
for s in range(len(U)):
for t in range(s + 1, len(U)):
if subgraphs[i][j].IsEdge(U[s], U[t]):
T = T + 1
for s in range(len(D)):
for t in range(s + 1, len(D)):
if subgraphs[i][j - 2].IsEdge(D[s], D[t]):
T = T + 1
for i in range(len(S)):
for j in range(len(S[i]) - 1):
T = T + algorithm(subgraphs[i][j], D)
return T
import snap
import sys
# Simple script to re-index to 0-indexed graph.
graph = sys.argv[1]
if len(sys.argv) > 2 and sys.argv[2] == 1:
Gin = snap.LoadEdgeList(snap.PUNGraph, graph)
else:
Gin = snap.LoadEdgeList(snap.PNGraph, graph)
MxScc = snap.GetMxScc(Gin)
Gout = snap.ConvertGraph(snap.PNGraph, MxScc, True)
print 'Number of nodes: ', Gout.GetNodes()
print 'Number of edges: ', Gout.GetEdges()
snap.SaveEdgeList(Gout, graph)
def convert_to_undirected(in_Graph):
return snap.ConvertGraph(snap.PUNGraph, in_Graph)
import snap
import sys
# Simple script to re-index to 0-indexed graph.
graph = sys.argv[1]
if len(sys.argv) > 2 and sys.argv[2] == 2:
Gin = snap.LoadEdgeList(snap.PUNGraph, graph)
else:
Gin = snap.LoadEdgeList(snap.PNGraph, graph)
Gout = snap.ConvertGraph(snap.PNGraph, Gin, True)
print 'Number of nodes: ', Gout.GetNodes()
print 'Number of edges: ', Gout.GetEdges()
snap.SaveEdgeList(Gout, graph)
def convert_undirected(G1):
G2 = snap.ConvertGraph(snap.PUNGraph, G1)
return G2
G2.Save(FOut)
FOut.Flush()
FIn = snap.TFIn("test.graph")
G4 = snap.TNGraph.Load(FIn)
print "G4: Nodes %d, Edges %d" % (G4.GetNodes(), G4.GetEdges())
# save and load from a text file
snap.SaveEdgeList(G4, "test.txt", "Save as tab-separated list of edges")
G5 = snap.LoadEdgeList(snap.PNGraph, "test.txt", 0, 1)
print "G5: Nodes %d, Edges %d" % (G5.GetNodes(), G5.GetEdges())
# create a directed random graph on 10k nodes and 5k edges
G6 = snap.GenRndGnm(snap.PNGraph, 10000, 5000)
print "G6: Nodes %d, Edges %d" % (G6.GetNodes(), G6.GetEdges())
# convert to undirected graph
G7 = snap.ConvertGraph(snap.PUNGraph, G6)
print "G7: Nodes %d, Edges %d" % (G7.GetNodes(), G7.GetEdges())
# get largest weakly connected component
WccG = snap.GetMxWcc(G6)
# generate a network using Forest Fire model
G8 = snap.GenForestFire(1000, 0.35, 0.35)
print "G8: Nodes %d, Edges %d" % (G8.GetNodes(), G8.GetEdges())
# get a subgraph induced on nodes {0,1,2,3,4}
SubG = snap.GetSubGraph(G8, snap.TIntV.GetV(0, 1, 2, 3, 4))
# get 3-core of G8
Core3 = snap.GetKCore(G8, 3)
print "Core3: Nodes %d, Edges %d" % (Core3.GetNodes(), Core3.GetEdges())
import snap
import sys
'''
Simple script to get maximal bi-connected component.
'''
graph = sys.argv[1]
Gin = snap.LoadEdgeList(snap.PNGraph, graph)
BiCon = snap.GetMxBiCon(Gin)
Gout = snap.ConvertGraph(snap.PNGraph, BiCon, True)
print 'Number of nodes: ', Gout.GetNodes()
print 'Number of edges: ', Gout.GetEdges()
out_graph = graph.split('.txt')[0] + '-bicon.txt'
snap.SaveEdgeList(Gout, out_graph)
def intro():
# create a graph PNGraph
G1 = snap.TNGraph.New()
G1.AddNode(1)
G1.AddNode(5)
G1.AddNode(32)
G1.AddEdge(1, 5)
G1.AddEdge(5, 1)
G1.AddEdge(5, 32)
print("G1: Nodes %d, Edges %d" % (G1.GetNodes(), G1.GetEdges()))
# create a directed random graph on 100 nodes and 1k edges
G2 = snap.GenRndGnm(snap.PNGraph, 100, 1000)
print("G2: Nodes %d, Edges %d" % (G2.GetNodes(), G2.GetEdges()))
# traverse the nodes
for NI in G2.Nodes():
print("node id %d with out-degree %d and in-degree %d" %
(NI.GetId(), NI.GetOutDeg(), NI.GetInDeg()))
# traverse the edges
for EI in G2.Edges():
print("edge (%d, %d)" % (EI.GetSrcNId(), EI.GetDstNId()))
# traverse the edges by nodes
for NI in G2.Nodes():
for Id in NI.GetOutEdges():
print("edge (%d %d)" % (NI.GetId(), Id))
# generate a network using Forest Fire model
G3 = snap.GenForestFire(1000, 0.35, 0.35)
print("G3: Nodes %d, Edges %d" % (G3.GetNodes(), G3.GetEdges()))
# save and load binary
FOut = snap.TFOut("test.graph")
G3.Save(FOut)
FOut.Flush()
FIn = snap.TFIn("test.graph")
G4 = snap.TNGraph.Load(FIn)
print("G4: Nodes %d, Edges %d" % (G4.GetNodes(), G4.GetEdges()))
# save and load from a text file
snap.SaveEdgeList(G4, "test.txt", "Save as tab-separated list of edges")
G5 = snap.LoadEdgeList(snap.PNGraph, "test.txt", 0, 1)
print("G5: Nodes %d, Edges %d" % (G5.GetNodes(), G5.GetEdges()))
# generate a network using Forest Fire model
G6 = snap.GenForestFire(1000, 0.35, 0.35)
print("G6: Nodes %d, Edges %d" % (G6.GetNodes(), G6.GetEdges()))
# convert to undirected graph
G7 = snap.ConvertGraph(snap.PUNGraph, G6)
print("G7: Nodes %d, Edges %d" % (G7.GetNodes(), G7.GetEdges()))
# get largest weakly connected component of G
WccG = snap.GetMxWcc(G6)
# get a subgraph induced on nodes {0,1,2,3,4,5}
SubG = snap.GetSubGraph(G6, snap.TIntV.GetV(0, 1, 2, 3, 4))
# get 3-core of G
Core3 = snap.GetKCore(G6, 3)
# delete nodes of out degree 10 and in degree 5
snap.DelDegKNodes(G6, 10, 5)
print("G6a: Nodes %d, Edges %d" % (G6.GetNodes(), G6.GetEdges()))
# generate a Preferential Attachment graph on 1000 nodes and node out degree of 3
G8 = snap.GenPrefAttach(1000, 3)
print("G8: Nodes %d, Edges %d" % (G8.GetNodes(), G8.GetEdges()))
# vector of pairs of integers (size, count)
CntV = snap.TIntPrV()
# get distribution of connected components (component size, count)
snap.GetWccSzCnt(G8, CntV)
# get degree distribution pairs (degree, count)
snap.GetOutDegCnt(G8, CntV)
# vector of floats
EigV = snap.TFltV()
# get first eigenvector of graph adjacency matrix
snap.GetEigVec(G8, EigV)
# get diameter of G8
snap.GetBfsFullDiam(G8, 100)
# count the number of triads in G8, get the clustering coefficient of G8
snap.GetTriads(G8)
snap.GetClustCf(G8)
def main():
# Load data
nodes = pd.read_csv("../data/nodes.csv", sep='\t', index_col=0)
# Data in nice form
headers = list(nodes.columns)
nodes = np.asarray(nodes)
# Load social network accordingly
if path.exists("../data/youtube.graph"):
FIn = snap.TFIn("../data/youtube.graph")
social_network = snap.TNGraph.Load(FIn)
else:
edges = pd.read_csv("../data/edges.csv", sep='\t', index_col=0)
edges = np.asarray(edges).astype(int)
social_network = data2dag(edges, nodes.shape[0])
# Check for self edges
for e in social_network.Edges():
if e.GetSrcNId() == e.GetDstNId():
print("Self Loop Found:", e.GetSrcNId())
# CNM Algorithm from snap.py
print("Computing CNM")
start = timeit.default_timer()
CmtyV = snap.TCnComV()
undirected = snap.ConvertGraph(snap.PUNGraph, social_network)
snap.DelSelfEdges(undirected)
the_modularity = snap.CommunityCNM(undirected, CmtyV)
stop = timeit.default_timer()
node_to_cmty = np.zeros(nodes.shape[0])
cmty_sizes = np.zeros(len(CmtyV))
for i in range(len(CmtyV)):
for node in CmtyV[i]:
node_to_cmty[node] = i
cmty_sizes[i] = len(CmtyV[i])
cmtys = [[node for node in cmty] for cmty in CmtyV]
'''
edges = pd.read_csv("../data/edges.csv", sep='\t', index_col=0)
edges = np.asarray(edges).astype(int)
G = nx.Graph()
G.add_nodes_from(range(nodes.shape[0]))
G.add_edges_from(list(map(tuple, edges)))
'''
#assert(is_partition(G, cmtys))
#print("Calculating Modularity")
#modul = modularity(G, cmtys)
print("Results from Clauset-Newman-Moore:")
#print("Modularity:",modul)
print("Number of clusters:", len(CmtyV))
print("Time elapsed:", stop - start)
# Fun category stuff to do
upload_col = headers.index('category')
categories = set()
for i in range(nodes.shape[0]):
categories.add(nodes[i][upload_col])
idx_to_categories = list(categories)
print("Number of categories:", len(idx_to_categories))
categories_to_idx = dict()
for i in range(len(idx_to_categories)):
categories_to_idx[idx_to_categories[i]] = i
# Communities and categories
cmty_category_count = np.zeros((len(CmtyV), len(idx_to_categories)))
for i in range(nodes.shape[0]):
cmty_category_count[int(node_to_cmty[i]),
categories_to_idx[nodes[i][upload_col]]] += 1
cmty_category_count = cmty_category_count / cmty_sizes[:, np.newaxis]
# Create graphs per category
plt.figure()
plt.plot(sorted(np.max(cmty_category_count, axis=1), reverse=True),
label="Top proportion")
plt.plot(0.5 * np.ones(cmty_category_count.shape[0]),
label="Majority Threshold",
linestyle='dashed')
plt.title("Category Proportions in Clusters")
plt.xlabel("Cluster")
plt.ylabel("Proportion")
plt.legend()
plt.savefig("../figures/category_top_clusters.png")
'''
for i in range(cmty_category_count.shape[0]):
top_category = np.argmax(cmty_category_count[i])
print("Community "+str(i)+": "+str(idx_to_categories[top_category])+",",cmty_category_count[i][top_category])
'''
'''