move examples directory out of doc directory

--HG--
extra : convert_revision : svn%3A3ed01bd8-26fb-0310-9e4c-ca1a4053419f/networkx/trunk%40961

2 files changed, 70 insertions, 0 deletions

diff --git a/examples/basic/properties.py b/examples/basic/properties.py
new file mode 100644
index 00000000..0d8fa434
--- /dev/null
+++ b/examples/basic/properties.py
@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+"""
+Compute some network properties for the lollipop graph.
+"""
+#    Copyright (C) 2004 by 
+#    Aric Hagberg <hagberg@lanl.gov>
+#    Dan Schult <dschult@colgate.edu>
+#    Pieter Swart <swart@lanl.gov>
+#    Distributed under the terms of the GNU Lesser General Public License
+#    http://www.gnu.org/copyleft/lesser.html
+
+from networkx import *
+
+G = lollipop_graph(4,6)
+
+pathlengths=[]
+
+print "source vertex {target:length, }"
+for v in G.nodes():
+    spl=single_source_shortest_path_length(G,v)
+    print v,spl
+    for p in spl.values():
+        pathlengths.append(p)
+
+print
+print "average shortest path length ", sum(pathlengths)/len(pathlengths)
+
+# histogram of path lengths 
+dist={}
+for p in pathlengths:
+    if dist.has_key(p):
+        dist[p]+=1
+    else:
+        dist[p]=1
+
+print
+print "length #paths"
+verts=dist.keys()
+verts.sort()
+for d in verts:
+    print d,dist[d]
+
+print "radius: ",radius(G)
+print "diameter: ",diameter(G)
+print "eccentricity: ",eccentricity(G,with_labels=True)
+print "center: ",center(G)
+print "periphery: ",periphery(G)
+print "density: ", density(G)
+
diff --git a/examples/basic/read_write.py b/examples/basic/read_write.py
new file mode 100644
index 00000000..08c22970
--- /dev/null
+++ b/examples/basic/read_write.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+"""
+Read and write graphs.
+"""
+__author__ = """Aric Hagberg (hagberg@lanl.gov)"""
+#    Copyright (C) 2004-2006 by 
+#    Aric Hagberg <hagberg@lanl.gov>
+#    Dan Schult <dschult@colgate.edu>
+#    Pieter Swart <swart@lanl.gov>
+#    Distributed under the terms of the GNU Lesser General Public License
+#    http://www.gnu.org/copyleft/lesser.html
+
+from networkx import *
+import sys
+G=grid_2d_graph(5,5)  # 5x5 grid
+write_adjlist(G,sys.stdout) # write adjacency list to screen
+# write edgelist to grid.edgelist
+write_edgelist(G,path="grid.edgelist",delimiter=":") 
+# read edgelist from grid.edgelist
+H=read_edgelist(path="grid.edgelist",delimiter=":") 
+