Using Networkx to draw graph
Author
posted @ 2014年4月13日 14:51
in Python
, 14907 阅读
Draw a directed graph using Networkx
Code :
try:
import matplotlib.pyplot as plt
except:
raise
import networkx as nx
G=nx.DiGraph()
# Add nodes by specifying their positions
G.add_node('10', pos=(2, 10))
G.add_node('9', pos=(4, 9))
G.add_node('8', pos=(0, 13))
G.add_node('7', pos=(1.5, 4))
G.add_node('6', pos=(4, 4))
G.add_node('5', pos=(6, 11))
G.add_node('3', pos=(6, 6))
G.add_node('0', pos=(0, 0))
# Add edges by defining weight and label
G.add_edge('10','9',weight=1, label='I')
G.add_edge('10','8',weight=1, label='I')
G.add_edge('10','7',weight=1, label='I')
G.add_edge('9','3', weight=1, label='I')
G.add_edge('9','6',weight=1, label='I')
G.add_edge('9','5',weight=1, label='I')
G.add_edge('7','0',weight=1, label='I')
G.add_edge('7','6',weight=0, label='II')
G.add_edge('6','3',weight=0, label='II')
G.add_edge('5','3',weight=0, label='II')
elarge=[(u,v) for (u,v,d) in G.edges(data=True) if d['weight'] >0.5] # solid edge
esmall=[(u,v) for (u,v,d) in G.edges(data=True) if d['weight'] <=0.5] # dashed edge
# Retrieve the positions from graph nodes and save to a dictionary
pos=nx.get_node_attributes(G,'pos')
# Draw nodes
nx.draw_networkx_nodes(G,pos,node_size=700, node_color='orange')
# Draw edges
nx.draw_networkx_edges(G,pos,edgelist=elarge, width=2, edge_color='g')
nx.draw_networkx_edges(G,pos,edgelist=esmall, arrows=False, width=3,
alpha=0.5,edge_color='b',style='dashed')
# Draw node labels
nx.draw_networkx_labels(G,pos,font_size=18,font_family='sans-serif')
# Draw edge labels
edge_labels =dict([((u, v), d['label'])
for u, v, d in G.edges(data=True)])
nx.draw_networkx_edge_labels(G, pos, edge_labels=edge_labels)
plt.axis('off')
plt.savefig("communication_authority_graph.eps", format='eps') # save as eps
plt.show() # display
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