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/plotly_with_arrow.py Secret
Created Oct 12, 2017

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Plotly with directed arrows as annotations
import math
import plotly.offline as py
from plotly.graph_objs import *
py.init_notebook_mode(connected=True)
%matplotlib inline
import networkx as nx
G=nx.random_geometric_graph(200,0.125)
pos=nx.get_node_attributes(G,'pos')
dmin=1
ncenter=0
for n in pos:
x,y=pos[n]
d=(x-0.5)**2+(y-0.5)**2
if d<dmin:
ncenter=n
dmin=d
p=nx.single_source_shortest_path_length(G,ncenter)
node_trace = Scatter(
x=[],
y=[],
text=[],
mode='markers',
hoverinfo='text',
marker=Marker(
showscale=True,
# colorscale options
# 'Greys' | 'Greens' | 'Bluered' | 'Hot' | 'Picnic' | 'Portland' |
# Jet' | 'RdBu' | 'Blackbody' | 'Earth' | 'Electric' | 'YIOrRd' | 'YIGnBu'
colorscale='YIGnBu',
reversescale=True,
color=[],
size=10,
colorbar=dict(
thickness=15,
title='Node Connections',
xanchor='left',
titleside='right'
),
line=dict(width=2)))
for node in G.nodes():
x, y = G.node[node]['pos']
node_trace['x'].append(x)
node_trace['y'].append(y)
for node, adjacencies in enumerate(G.adjacency_list()):
node_trace['marker']['color'].append(len(adjacencies))
node_info = '# of connections: '+str(len(adjacencies))
node_trace['text'].append(node_info)
# initialize a list of edge traces
edge_trace = []
marker_size=5
for edge in G.edges():
x0, y0 = G.node[edge[0]]['pos']
x1, y1 = G.node[edge[1]]['pos']
edge_trace.append(dict(x=x1,
y=y1,
ax=x0,
ay=y0,
axref='x',
ayref='y',
showarrow=True,
arrowwidth=2,
arrowcolor='#2a3855'
)
)
fig = Figure(data=Data([node_trace]),
layout=Layout(
title='<br>Network graph made with Python',
titlefont=dict(size=16),
showlegend=False,
hovermode='closest',
margin=dict(b=20,l=5,r=5,t=40),
annotations=edge_trace,
xaxis=XAxis(showgrid=False, zeroline=False, showticklabels=False),
yaxis=YAxis(showgrid=False, zeroline=False, showticklabels=False)))
py.iplot(fig, filename='networkx')
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