diff env/share/doc/networkx-2.5/examples/drawing/plot_directed.py @ 0:4f3585e2f14b draft default tip

"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/env/share/doc/networkx-2.5/examples/drawing/plot_directed.py	Mon Mar 22 18:12:50 2021 +0000
@@ -0,0 +1,44 @@
+"""
+==============
+Directed Graph
+==============
+
+Draw a graph with directed edges using a colormap and different node sizes.
+
+Edges have different colors and alphas (opacity). Drawn using matplotlib.
+"""
+
+import matplotlib as mpl
+import matplotlib.pyplot as plt
+import networkx as nx
+
+G = nx.generators.directed.random_k_out_graph(10, 3, 0.5)
+pos = nx.layout.spring_layout(G)
+
+node_sizes = [3 + 10 * i for i in range(len(G))]
+M = G.number_of_edges()
+edge_colors = range(2, M + 2)
+edge_alphas = [(5 + i) / (M + 4) for i in range(M)]
+
+nodes = nx.draw_networkx_nodes(G, pos, node_size=node_sizes, node_color="blue")
+edges = nx.draw_networkx_edges(
+    G,
+    pos,
+    node_size=node_sizes,
+    arrowstyle="->",
+    arrowsize=10,
+    edge_color=edge_colors,
+    edge_cmap=plt.cm.Blues,
+    width=2,
+)
+# set alpha value for each edge
+for i in range(M):
+    edges[i].set_alpha(edge_alphas[i])
+
+pc = mpl.collections.PatchCollection(edges, cmap=plt.cm.Blues)
+pc.set_array(edge_colors)
+plt.colorbar(pc)
+
+ax = plt.gca()
+ax.set_axis_off()
+plt.show()