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- """
- =======
- Mayavi2
- =======
- """
- import networkx as nx
- import numpy as np
- from mayavi import mlab
- # some graphs to try
- # H=nx.krackhardt_kite_graph()
- # H=nx.Graph();H.add_edge('a','b');H.add_edge('a','c');H.add_edge('a','d')
- # H=nx.grid_2d_graph(4,5)
- H = nx.cycle_graph(20)
- # reorder nodes from 0,len(G)-1
- G = nx.convert_node_labels_to_integers(H)
- # 3d spring layout
- pos = nx.spring_layout(G, dim=3, seed=1001)
- # numpy array of x,y,z positions in sorted node order
- xyz = np.array([pos[v] for v in sorted(G)])
- # scalar colors
- scalars = np.array(list(G.nodes())) + 5
- mlab.figure()
- pts = mlab.points3d(
- xyz[:, 0],
- xyz[:, 1],
- xyz[:, 2],
- scalars,
- scale_factor=0.1,
- scale_mode="none",
- colormap="Blues",
- resolution=20,
- )
- pts.mlab_source.dataset.lines = np.array(list(G.edges()))
- tube = mlab.pipeline.tube(pts, tube_radius=0.01)
- mlab.pipeline.surface(tube, color=(0.8, 0.8, 0.8))
- mlab.orientation_axes()
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