使用 matplotlib python 绘制图形

Question

I need to plot the graph for the following solution of the ACO TSP. The graph that I need to plot would be something close to this:

Any code snippets on which I could work on?

Answer 1

From the documentation of tsplib95 :

 Converting problems get_graph() creates a.networkx.Graph instance from the problem data: >>> G = problem.get_graph() >>> G.nodes NodeView((1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16))

So, G is a networkx graph, which means you can use networkx to draw it:

import matplotlib.pyplot as plt
import networkx as nx

nx.draw_networkx(G)
plt.show()

edit: drawing the path:

pos = nx.spring_layout(G)

H = nx.DiGraph(G) # convert to directed graph s.t. the edges have arrows. 

nx.draw_networkx_nodes(H, pos=pos) # draw nodes
nx.draw_networkx_edges(H, pos=pos, alpha=0.1) # draw all edges with transparency
nx.draw_networkx_edges(H, pos=pos, edgelist=tour.path, edge_color='red') # highlight the edges in the path

plt.show()

Answer 2

I need to plot the graph for the following solution of the ACO TSP. The graph that I need to plot would be something close to this:

Any code snippets on which I could work on?