how to plot a networkx graph using the (x,y) coordinates of the points list?

Question

I have points as x,y and I want to plot my graph using the (x,y) coordinates of my points list so that I can see the axis. here are my code and photo of the graph

import networkx as nx
import matplotlib.pyplot as plt
def add_edge_to_graph(G,e1,e2,w):
   G.add_edge(e1,e2,weight=w) 

G=nx.Graph()
points=[(1, 10), (8, 10), (10, 8), (7, 4), (3, 1)] #(x,y) points
edges=[(0, 1, 10), (1, 2, 5), (2, 3, 25), (0, 3, 3), (3, 4, 8)]#(v1,v2, weight)

for i in range(len(edges)):
       add_edge_to_graph(G,points[edges[i][0]],points[edges[i][1]],edges[i][2])
       
     
pos = nx.spring_layout(G)
nx.draw(G,pos=pos,node_color='k')
nx.draw(G, pos=pos, node_size=1500)  # draw nodes and edges
nx.draw_networkx_labels(G, pos=pos)  # draw node labels/names
# draw edge weights
labels = nx.get_edge_attributes(G, 'weight')
nx.draw_networkx_edge_labels(G, pos, edge_labels=labels)
plt.axis()
plt.show()

https://i.stack.imgur.com/criYx.png

Do you want that your graph is drawn using the (x,y) coordinates of your points list? Or do you just want to switch on the axis with ticks? — Sparky05, Nov 24 '20 at 12:19
@Sparky05 yes, i want to draw it using the (x,y) coordinates — Faisal, Nov 24 '20 at 12:25
@Sparky05 :for example, i want it to be something like this https://imgur.com/8OqiVtw — Faisal, Nov 24 '20 at 13:00

score 4 · Accepted Answer · answered Nov 24 '20 at 13:00

This should solve your problem:

import networkx as nx
import matplotlib.pyplot as plt


def add_edge_to_graph(G, e1, e2, w):
    G.add_edge(e1, e2, weight=w)


G = nx.Graph()
points = [(1, 10), (8, 10), (10, 8), (7, 4), (3, 1)]  # (x,y) points
edges = [(0, 1, 10), (1, 2, 5), (2, 3, 25), (0, 3, 3), (3, 4, 8)]  # (v1,v2, weight)

for i in range(len(edges)):
    add_edge_to_graph(G, points[edges[i][0]], points[edges[i][1]], edges[i][2])

# you want your own layout
# pos = nx.spring_layout(G)
pos = {point: point for point in points}

# add axis
fig, ax = plt.subplots()
nx.draw(G, pos=pos, node_color='k', ax=ax)
nx.draw(G, pos=pos, node_size=1500, ax=ax)  # draw nodes and edges
nx.draw_networkx_labels(G, pos=pos)  # draw node labels/names
# draw edge weights
labels = nx.get_edge_attributes(G, 'weight')
nx.draw_networkx_edge_labels(G, pos, edge_labels=labels, ax=ax)
plt.axis("on")
ax.set_xlim(0, 11)
ax.set_ylim(0,11)
ax.tick_params(left=True, bottom=True, labelleft=True, labelbottom=True)
plt.show()

Result

Backround

For the axis, I used plt.axis("on") as already suggested above together with How to make x and y axes appear when using networkx and matplotlib?

Additionaly, I replaced the spring_layout with the positions in your points list.

@Faisal: Take a look [here](https://stackoverflow.com/help/someone-answers) and I would recommend to do the general tour. E.g. you could (have) edited your question to clarify your points and (after you collect some rep) you can also directly include figures in your question. — Sparky05, Nov 24 '20 at 15:26

score 0 · Answer 2 · answered Nov 24 '20 at 12:39

0

I would try to turn axis on with :

limits = plt.axis("on")

So that you're able to use draw with axis.

answered Nov 24 '20 at 12:39

Henry Mont

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score 0 · Answer 3 · answered Apr 10 '23 at 10:19

This doesn't use networkx, but quite handy if you quickly want to visualize points and see the edges.

sample code:

import matplotlib.pyplot as plt

# sample of edges where each node comprises of an x and y coordinate.
edges = [((84, 96), (93, 20)), ((93, 20), (94, 42)), ((94, 42), (98, 88))]

fig, ax = plt.subplots()
for edge in edges:
    x = [edge[0][0], edge[1][0]]
    y = [edge[0][1], edge[1][1]]
    ax.plot(x, y, '-o')

how to plot a networkx graph using the (x,y) coordinates of the points list?

3 Answers3

Result

Backround

sample code:

sample output:

Linked