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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() | |