I’m trying to display edge weights of Networkx graph while plotting using plotly. There is a problem in displaying the edge weights as edge labels while hovering over edges of the resulting plot. Code: import numpy as np import networkx as nx import plotly.graph_objects as go from pprint import p…

@Natasha Meanwhile I tried to find out why your Plotly figure was different from that drawn with networkx. I noticed that you labeled the nodes in the Excel file starting with 1, but Plotly code supposed that nodes are labeled from 0. So there was a nonconcordance between node labels and edge en…

Hi @Natasha , Plotly associates a text to a position of coordinates (x, y). An edge is not defined by a unique point to assign it a text. In order to display the edge weights you can define one more scatter trace, of mode='text', and its x, y lists are the middle point coordinates of the edges. …

@empet Thanks a lot. Could you please explain how to add the node labels here? For instance, I want to use node numbers as node labels. Also, I’d like to know how to view the edge weights only when I hover over a given edge. I don’t want the text to be displayed by default.

[image] Natasha: Also, I’d like to know how to view the edge weights only when I hover over a given edge. I don’t want the text to be displayed by default. I could do this by changing mode=‘lines’ in eweights_trace.

@Natasha Define the corresponding trace like this: eweights_trace = go.Scatter(x=xtext,y= ytext, mode='markers', marker_size=0.5, text=[0.45, 0.7, 0.34], #textposition='top cent…

@empet [image] Natasha: Could you please explain how to add the node labels here? For instance, I want to use node numbers as node labels Could you please suggest how this can be done?

@empet I tried this nlabels_trace = go.Scatter(x=node_x, y=node_y, mode='markers', marker_size=0.5, text=[1, 2, 3, 4], # textposition='top…

@empet Thanks a lot for the response on the other post. Actually, I did pos = OrderedDict(zip(sorted(G.nodes), xpos_ypos)) and that solved my problem. I’m not really sure how this solved the indexing problem that you are referring to. I was using Network for the same reason that you mentioned. To…

@Natasha To display both label and coords, set in the definition of the function get_node_trace() mode='markers' and hoverinfo='text+x+y'

@empet Thank you. But, is there an option to add two node labels ?

Yes, for a graph with 5 nodes of id 0, 1, 2, 3, 4, and labels as below: node= np.arange(5) secondary_label=[' A', ' B', 'C', 'D', 'E'] define in node_trace: text= [f'node id: {n}<br>label: {sl}' for n, sl in zip(node, secondary_label)] <br> is html tag for newline.

Displaying edge labels of networkx graph in plotly

📊 Plotly Python

Natasha October 25, 2020, 2:22pm 15

@empet
Could you please have a look at this Plot 3D network graph post?

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Displaying edge labels of networkx graph in plotly

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