我有这个函数,我想画一个自环。我该怎么做?
边缘存在,但我认为在这个例子中它只是一个点(1,1),我无法添加节点的名称。
我的目标是从邻接矩阵绘制图形。是否有更好的方法来做到这一点?
import networkx as nx
import matplotlib.pyplot as plt
from matplotlib.patches import FancyArrowPatch, Circle
import numpy as np
def draw_network(G,pos,ax,sg=None):
for n in G:
c=Circle(pos[n],radius=0.05,alpha=0.7)
ax.add_patch(c)
G.node[n]['patch']=c
x,y=pos[n]
seen={}
for (u,v,d) in G.edges(data=True):
n1=G.node[u]['patch']
n2=G.node[v]['patch']
rad=0.1
if (u,v) in seen:
rad=seen.get((u,v))
rad=(rad+np.sign(rad)*0.1)*-1
alpha=0.5
color='k'
e = FancyArrowPatch(n1.center,n2.center,patchA=n1,patchB=n2,
arrowstyle='-|>',
connectionstyle='arc3,rad=%s'%rad,
mutation_scale=10.0,
lw=2,
alpha=alpha,
color=color)
seen[(u,v)]=rad
ax.add_patch(e)
return e
G=nx.MultiDiGraph([(1,2),(1,1),(1,2),(2,3),(3,4),(2,4),
(1,2),(1,2),(1,2),(2,3),(3,4),(2,4)]
)
pos=nx.spring_layout(G)
ax=plt.gca()
draw_network(G,pos,ax)
ax.autoscale()
plt.axis('equal')
plt.axis('off')
plt.show()
Image(A.draw(format='png'))
将图形以 内联 的方式打印到同一浏览器会话中。需要通过from IPython.display import Image
进行导入Image
。 - llinfeng