Network图 

Concepts
Centrality: importance of nodes and edges
	• Degree: number of neighbours
	• Closeness: average distance
	• Betweenness: shortest paths
	• Status or rank: neighbour importance
	• Edge centrality
	• Betweenness: shortest paths
Cohesion: how strongly connected is it
	• Density
	• Number of cliques, bi-cliques and k-cores
	• Clustering coefficient
	• Vertex or edge connectivity
Assortative mixing: what kind of node talks to what
Clustering & partitioning


Draw a simple graph