Refactor examples (#2527)

* Fix unix_email and plot more examples

* Fix doctest

* Fix more examples

* Fix AntiGraph.degree generator error in examples

* Style/consistency changes and plot more examples

1 files changed, 42 insertions, 0 deletions

diff --git a/examples/graph/plot_degree_sequence.py b/examples/graph/plot_degree_sequence.py
new file mode 100644
index 00000000..6ba7a644
--- /dev/null
+++ b/examples/graph/plot_degree_sequence.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+"""
+===============
+Degree Sequence
+===============
+
+Random graph from given degree sequence.
+"""
+# Author: Aric Hagberg (hagberg@lanl.gov)
+# Date: 2004-11-03 08:11:09 -0700 (Wed, 03 Nov 2004)
+# Revision: 503
+
+#    Copyright (C) 2004-2017 by
+#    Aric Hagberg <hagberg@lanl.gov>
+#    Dan Schult <dschult@colgate.edu>
+#    Pieter Swart <swart@lanl.gov>
+#    All rights reserved.
+#    BSD license.
+
+import matplotlib.pyplot as plt
+from networkx import nx
+
+z = [5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1]
+print(nx.is_valid_degree_sequence(z))
+
+print("Configuration model")
+G = nx.configuration_model(z)  # configuration model
+degree_sequence = [d for n, d in G.degree()]  # degree sequence
+print("Degree sequence %s" % degree_sequence)
+print("Degree histogram")
+hist = {}
+for d in degree_sequence:
+    if d in hist:
+        hist[d] += 1
+    else:
+        hist[d] = 1
+print("degree #nodes")
+for d in hist:
+    print('%d %d' % (d, hist[d]))
+
+nx.draw(G)
+plt.show()