GetKCore

GetKCore(K)

A graph method that returns the K-core of a graph. If the core of order K does not exist, the function returns an empty graph.

Parameters

• K: int

  Minimum degree needed for a subgraph to be in the core.

Return value:

• graph

  A graph or a network where all nodes have degree >= K. The graph is empty if no such graph exists.

The following example shows how to check if a K-Core subgraph exists for TNGraph, TUNGraph, and TNEANet:

import snap

Graph = snap.GenRndGnm(snap.TNGraph, 100, 1000)
K = 5
KCore = Graph.GetKCore(K)
if KCore.Empty():
    print('No Core exists for K=%d' % K)
else:
    print('Core exists for K=%d' % K)

UGraph = snap.GenRndGnm(snap.TUNGraph, 100, 1000)
K = 10
KCore = UGraph.GetKCore(K)
if KCore.Empty():
    print('No Core exists for K=%d' % K)
else:
    print('Core exists for K=%d' % K)

Network = snap.GenRndGnm(snap.TNEANet, 100, 1000)
K = 15
KCore = Network.GetKCore(K)
if KCore.Empty():
    print('No Core exists for K=%d' % K)
else:
    print('Core exists for K=%d' % K)