Ring Graph Animation ¶
Ring Graph Animation¶
This example demonstrates how to use Matplotlib’s animation features in order to animate a ring graph sequentially being revealed.
import igraph as ig
import matplotlib.pyplot as plt
# Animate a directed ring graph
g = ig.Graph.Ring(10, directed=True)
# Make 2D ring layout
layout = g.layout_circle()
# Create canvas
fig, ax = plt.subplots()
ax.set_aspect(1)
# Prepare interactive backend for autoupdate
plt.ion()
plt.show()
# Animate, one vertex at a time
for frame in range(11):
# Remove plot elements from the previous frame
ax.clear()
# Fix limits (unless you want a zoom-out effect)
ax.set_xlim(-1.5, 1.5)
ax.set_ylim(-1.5, 1.5)
# Plot subgraph
gd = g.subgraph(range(frame))
ig.plot(gd, target=ax, layout=layout[:frame], vertex_color="yellow")
# matplotlib animation infrastructure
fig.canvas.draw_idle()
fig.canvas.start_event_loop(0.5)
The received output is:

Sequentially Animated Ring Graph¶
Note
We use igraph’s Graph.subgraph()
(see induced_subgraph()
) in order to obtain a section of the ring graph at a time for each frame.