讲义课件资料数据可视化7_networkvis_2.pptx,社交网络可视化第一印象:物理世界场景1场景2第一印象:电子世界场景1场景2场景3Social Networks Huge number of usersMore time spent on social networks 为何需要社交网络可视化?Social NetworkNode VEdge ESocial Graph G=(V