GetSubGraphRenumber

GetSubGraphRenumber(NIdV)

A graph method that returns the subgraph induced by the nodes in NIdV with renumbered node ids from 0 to N-1. This function is implemented for TNGraph and TUNGraph.

Parameters:

• NIdV: Python list or TIntV, a vector of ints

  Node id vector. The subgraph consists of all nodes in NIdV and the edges between nodes in NIdV.

Return value:

• graph

  A subgraph that has the same type as the original graph and contains the nodes with ids in the NIdV vector and all the edges with both nodes in NIdV. The nodes in the resulting subgraph are renumbered sequentially from 0 to N-1.

For more information, see: http://en.wikipedia.org/wiki/Glossary_of_graph_theory#Subgraphs

The following example shows how to get subgraphs for TNGraph and TUNGraph:

import snap

Graph = snap.GenRndGnm(snap.TNGraph, 50, 500)
Nodes = []
for N in Graph.GetNI(0).GetOutEdges():
    Nodes.append(N)
# Get subgraph induced by the neighbors of Node 0
SubGraph = Graph.GetSubGraphRenumber(Nodes)

UGraph = snap.GenCircle(snap.TUNGraph, 100, 2, False)
Nodes = []
for N in UGraph.GetNI(50).GetOutEdges():
    Nodes.append(N)
# Get subgraph induced by the neighbors of Node 50
SubGraph = UGraph.GetSubGraphRenumber(Nodes)