创建确定的边和节点的图

Question

I want to create a graph that shows connected nodes and edges. I have determined the nodes and edges.

import matplotlib.pyplot as plt
import networkx as nx
%matplotlib notebook

G = nx.Graph()

G.add_node(y[i]==1, color="blue", size=500)
G.add_node(y[i]==0, color="green", size=300)
G.add_edge(d[k,i]*w[k,i], color="green")
G.add_edge(d[i,j]*f[i,j]>0, color="blue")

nx.draw(G, with_labels=True)
plt.show()

Here are the nodes and edges that are determined ( W[k,i] is a longer list) W & F are edges, Y are nodes. d[i,j] is the distance. Distance is between nodes with given positions.

Y[0] 1
Y[1] 1
Y[3] 1
Y[12] 1
Y[57] 1
Y[59] 1
W[22,0] 1
W[23,0] 1
W[24,0] 1
F[0,0] 5
F[0,1] 5
F[1,3] 4
F[3,59] 3
F[3,98] 3.63798e-12
F[8,51] 5.65326e-12
F[24,8] 4.65317e-12
F[25,0] 7.10543e-15
F[25,24] 1.81366e-12
F[51,8] 1.56776e-15
F[51,59] 4.78817e-12
F[57,12] 1
F[59,57] 2

I get this error:

TypeError                                 Traceback (most recent call last)
<ipython-input-314-9036a4e704aa> in <module>
     23 G.add_node(y[i]==1, color="blue", size=500)
     24 G.add_node(y[i]==0, color="green", size=300)
---> 25 G.add_edge(d[k,i]*w[k,i], color="green")
     26 G.add_edge(d[i,j]*f[i,j]>0, color="blue")
     27 

TypeError: add_edge() missing 1 required positional argument: 'v_of_edge'

What do I need to add to make the graph?

Answer 1

add_edge takes 2 mandatory parameters as an input: u_of_edge and v_of_edge .
In your code

G.add_edge(u_of_edge=d[k,i]*w[k,i], color="green")
             ^^^^^^
G.add_edge(u_of_edge=d[i,j]*f[i,j]>0, color="blue")
             ^^^^^^

you are missing the v_of_edge node, and that's why you are getting the TypeError .