Adding an edge/node with a color attribute
I a using the networkx
package of Python. The documentation says we can do H.add_e开发者_StackOverflow中文版dge(1,2,color='blue')
but the output shows an edge with the default (black) color. When I do H.add_node(12,color='green')
I get a new node with same default red color.
Peter, according to the documentation, to change the color with which nodes/edges are drawn, you have to provide the node_color
argument to the drawing function. I.e. from this example, to draw a graph like this (note different colors of nodes):
The code is:
#!/usr/bin/env python
"""
Draw a graph with matplotlib.
You must have matplotlib for this to work.
"""
__author__ = """Aric Hagberg (hagberg@lanl.gov)"""
try:
import matplotlib.pyplot as plt
except:
raise
import networkx as nx
G=nx.house_graph()
# explicitly set positions
pos={0:(0,0),
1:(1,0),
2:(0,1),
3:(1,1),
4:(0.5,2.0)}
nx.draw_networkx_nodes(G,pos,node_size=2000,nodelist=[4])
nx.draw_networkx_nodes(G,pos,node_size=3000,nodelist=[0,1,2,3],node_color='b')
nx.draw_networkx_edges(G,pos,alpha=0.5,width=6)
plt.axis('off')
plt.savefig("house_with_colors.png") # save as png
plt.show() # display
Note the node_color
argument to the second call to draw_networkx_nodes
. Does this help?
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