def test_scaling():
vs = [Vertex(str(i)) for i in xrange(100)]
# g = Graph(vs, [])
g_scale = ScalingNetworkGraph(.1, 50, 400)
print g_scale.avg_deg
# g = [SmallWorldGraph(vs, int(round(g_scale.avg_deg)), 0) for i in xrange(20)]
# gL = avg([ele.length for ele in g])
# gC = avg([ele.clust for ele in g])
# g = SmallWorldGraph(vs, int(round(g_scale.avg_deg)), .1)
# # g.add_regular_edges(11)
layout = CircleLayout(g_scale)
# # draw the graph
gw = GraphWorld()
gw.show_graph(g_scale, layout)
gw.mainloop()
# layout = CircleLayout(gscale)
# gw = GraphWorld()
# gw.show_graph(g_norm, layout)
# gw.mainloop()
print gL, gC
def draw_graph(g):
layout = CircleLayout(g)
# draw the graph
gw = GraphWorld()
gw.show_graph(g, layout)
gw.mainloop()
def main():
g = SmallWorldGraph(1000, 10)
g.rewire(0.10)
print g.clustering_coefficient()
print g.shortest_path_coeff()
layout = GraphWorld.CircleLayout(g)
# draw the graph
gw = GraphWorld.GraphWorld()
gw.show_graph(g, layout)
gw.mainloop()
def main():
read_write = TspRW() # create a read_write object
read_write.read_file(raw_input('Enter file to read from: ')) # reads all the coordinates of citties from an ASCII file
l = read_write.labels
c = read_write.coordinates
handle = Nearest_Neighbour(l, c) # create a Nearest_neigbour class from the given vertices
# for each vertex
for i in handle.vertices:
handle.mark_unvisited_cities() # mark all the citites unvisited
handle.empty_tour() # empties the tour
handle.startcity = i # set the city to start city
handle.currentcity = handle.startcity # sets the start city to current city
handle.mark_visited() # marks the city visited
# while there is an unvisited city
while len(handle.coordinates)!= 0:
handle.calculate_nearneighbor() # find the nearest neighbour for the current city
handle.add_currcity_tour() # adds the current city to the tour
handle.add_tourCost() # adds the cost to the tour
handle.currentcity = handle.nearestcity # sets nearest city to current city
handle.mark_visited() # marks the current city visited
e = Edge(handle.currentcity, handle.startcity) # creates the last edge between the current and start city
handle.best_tour.add_edge(e) # add that last edge to best tour
# updates best_tour_so_far if the last tour was lest costly
if handle.cost_of_tour < handle.cost_of_best_tour_so_far :
handle.cost_of_best_tour_so_far = handle.cost_of_tour
handle.best_tour_so_far = handle.best_tour
handle.best_label_so_far = handle.best_label
handle.best_coordinates_so_far = handle.best_coordinates
# write the coordinates to an ASCII file with .tour extension
read_write.coordinates = handle.best_coordinates_so_far
read_write.labels = handle.best_label_so_far
read_write.write_file()
# print handle.best_tour_so_far
# print handle.cost_of_best_tour_so_far
# print handle.best_label_so_far
# print handle.best_coordinates_so_far
# for i in range(len(handle.best_label_so_far)):
# handle.best_label_so_far[i].pos = handle.best_coordinates_so_far
# The following two lines allows to swtich the layout of the graph displayed
layout = CartesianLayout(handle.best_tour_so_far)
# layout = RandomLayout(handle.best_tour_so_far)
# draw the graph
gw = GraphWorld()
gw.show_graph(handle.best_tour_so_far, layout)
gw.mainloop()
def generate_graph(self):
"""Generates the graph using GraphWorld.
"""
grapher = BestPath(self.ichose) # create a BestPath object, using chosen cities
grapher.set_map(self.graph) # set the map read from the database
# generate a Tour by calling the generate_actualtour method of BetPath Class
Tour = grapher.genrate_actualtour(Vertex(self.ichose[0]))
layout = CircleLayout(Tour)
gw = GraphWorld()
gw.show_graph(Tour, layout)
gw.mainloop()
def show_graph(g):
import GraphWorld
for v in g.vertices():
if v.visited:
v.color = 'white'
else:
v.color = 'red'
layout = GraphWorld.CircleLayout(g)
gw = GraphWorld.GraphWorld()
gw.show_graph(g, layout)
gw.mainloop()
def main():
time.clock()
object = TwoOpt() # create a two-opt object
read_write = TspRW() # create a read_write object
read_write.read_file(raw_input('Enter file to read from: ')) # reads all the coordinates of citties from an ASCII file
object.labels = read_write.labels # store the labels in a list
object.coordinates = read_write.coordinates # store the coordinates in this list
numRound = int(raw_input('Enter the number of random graphs you want to generate: '))
roundTimes = int(raw_input('Enter the number of times you want to swap edges: '))
for i in range(numRound):
object.generate_rand_graph() # generate a random graph
for i in range(roundTimes):
object.generate_rand_vertices() # randomly generate two indices which have no common connection
object.find_random_edge() # generate two random edges from the given indices
object.find_new_edge() # find the new edge if swap were to happen.
dx_oldtour = object.cal_distance_of_edge(object.edge1) + object.cal_distance_of_edge(object.edge2) # difference in cost before swapping using two-opt
dx_newtour = object.cal_distance_of_edge(object.new_edge1) + object.cal_distance_of_edge(object.new_edge2) # difference in cost after adding two edges.
if dx_newtour < dx_oldtour:
object.remove_edges()
object.add_edge_reversely()
if object.costOfBestTour > object.costOfTour:
bestTour = object.tour
bestTour_vertices = object.tour_vertices
object.costOfBestTour = object.costOfTour
# write the tour in .tour ASCII file
read_write.coordinates = []
read_write.labels = []
for i in bestTour_vertices:
read_write.coordinates.append(i.pos)
for i in bestTour_vertices:
read_write.labels.append(i.label)
read_write.write_file()
print 'Run time: ', time.clock()
# The following two lines allows to switch the layout of the graph displayed
# layout = CartesianLayout(bestTour)
layout = RandomLayout(bestTour)
# layout = CircleLayout(bestTour)
# draw the graph
gw = GraphWorld()
gw.show_graph(bestTour, layout)
gw.mainloop()
def test_regular_generator(n, k):
# create n Vertices
n = int(n)
k = int(k)
labels = string.ascii_lowercase + string.ascii_uppercase
vs = [Vertex(c) for c in labels[:n]]
# create a graph and a layout
g = Graph(vs)
# g.add_all_edges()
g.add_regular_edges(k)
layout = CircleLayout(g)
# draw the graph
gw = GraphWorld()
gw.show_graph(g, layout)
gw.mainloop()
def test_random_generator(n, p):
# create n Vertices
n = int(n)
p = float(p)
labels = string.ascii_lowercase + string.ascii_uppercase
vs = [Vertex(c) for c in labels[:n]]
# create a graph and a layout
g = RandomGraph(vs)
# g.add_all_edges()
g.add_random_edges(p)
layout = CircleLayout(g)
# draw the graph
gw = GraphWorld()
gw.show_graph(g, layout)
destroy_graph(gw, 2)
gw.mainloop()
def main(script, n='252', k='5', p='0.1', *args):
random.seed(17)
# create n Vertices
n = int(n)
k = int(k)
p = float(p)
names = name_generator()
vs = [Vertex(names.next()) for c in range(n)]
g = SmallWorldGraph(vs, k, p)
#from time import clock
print 'number of edges = ', len(g.edges())
print 'Is connected?', g.is_connected()
print 'diameter = ', g.diameter()
start = clock()
print 'char_length = ', g.char_length()
print clock()-start
start = clock()
print 'char_length2 = ', g.char_length2()
print clock()-start
start = clock()
print 'char_length3 = ', g.char_length3()
print clock()-start
start = clock()
print 'char_length4 = ', g.char_length4()
print clock()-start
print 'cluster_coef = ', g.cluster_coef()
# draw the graph
draw = False
if draw:
layout = CircleLayout(g)
gw = GraphWorld()
gw.show_graph(g, layout)
gw.mainloop()
def main():
read = ReadMap()
read.read_file("test.map")
print read.names
grapher = BestPath(read.names[:5])
grapher.set_map(read.graph)
bestTour = grapher.genrate_actualtour(Vertex(read.names[4]))
print bestTour
newGraph = Graph(bestTour.items)
for i in range(len(bestTour.items) - 1):
newEdge = Edge(bestTour.items[i], bestTour.items[i + 1])
newGraph.add_edge(newEdge)
layout = RandomLayout(newGraph)
# draw the graph
gw = GraphWorld()
gw.show_graph(newGraph, layout)
gw.mainloop()
def something():
n = 10
p = 1
# create n Vertices
n = int(n)
labels = string.ascii_lowercase + string.ascii_uppercase
vs = [Vertex(c) for c in labels[:n]]
# create a graph and a layout
# g = RandomGraph(vs, p)
g = Graph(vs, [])
g.add_regular_edges(4)
layout = CircleLayout(g)
# draw the graph
gw = GraphWorld()
gw.show_graph(g, layout)
gw.mainloop()
def main():
read_write = TspRW() # create a read_write object
read_write.read_file(raw_input('Enter file to read from: ')) # reads all the coordinates of citties from an ASCII file
# solver is an BNB object
solver = BNB(read_write.coordinates)
solver.explore() # explores all the vertex using BNB algorithm
# write the tour in .tour ASCII file
read_write.coordinates = solver.tour
read_write.write_file()
# The following two lines allows to switch the layout of the graph displayed
layout = CartesianLayout(solver.tourGraph)
# layout = RandomLayout(solver.tourGraph)
# layout = CircleLayout(solver.tourGraph)
# draw the graph
gw = GraphWorld()
gw.show_graph(solver.tourGraph, layout)
gw.mainloop()
def test_scaling():
vs = [Vertex(str(i)) for i in xrange(100)]
# g = Graph(vs, [])
g_scale = ScalingNetworkGraph(.1, 50, 400)
print g_scale.avg_deg
# g = [SmallWorldGraph(vs, int(round(g_scale.avg_deg)), 0) for i in xrange(20)]
# gL = avg([ele.length for ele in g])
# gC = avg([ele.clust for ele in g])
# g = SmallWorldGraph(vs, int(round(g_scale.avg_deg)), .1)
# # g.add_regular_edges(11)
layout = CircleLayout(g_scale)
# # draw the graph
gw = GraphWorld()
gw.show_graph(g_scale, layout)
gw.mainloop()
# layout = CircleLayout(gscale)
# gw = GraphWorld()
# gw.show_graph(g_norm, layout)
# gw.mainloop()
print gL, gC
def main():
read_write = TspRW() # create a read_write object
read_write.read_file(
raw_input('Enter file to read from: '
)) # reads all the coordinates of citties from an ASCII file
l = read_write.labels
c = read_write.coordinates
handle = Nearest_Neighbour(
l, c) # create a Nearest_neigbour class from the given vertices
# for each vertex
for i in handle.vertices:
handle.mark_unvisited_cities() # mark all the citites unvisited
handle.empty_tour() # empties the tour
handle.startcity = i # set the city to start city
handle.currentcity = handle.startcity # sets the start city to current city
handle.mark_visited() # marks the city visited
# while there is an unvisited city
while len(handle.coordinates) != 0:
handle.calculate_nearneighbor(
) # find the nearest neighbour for the current city
handle.add_currcity_tour() # adds the current city to the tour
handle.add_tourCost() # adds the cost to the tour
handle.currentcity = handle.nearestcity # sets nearest city to current city
handle.mark_visited() # marks the current city visited
e = Edge(handle.currentcity, handle.startcity
) # creates the last edge between the current and start city
handle.best_tour.add_edge(e) # add that last edge to best tour
# updates best_tour_so_far if the last tour was lest costly
if handle.cost_of_tour < handle.cost_of_best_tour_so_far:
handle.cost_of_best_tour_so_far = handle.cost_of_tour
handle.best_tour_so_far = handle.best_tour
handle.best_label_so_far = handle.best_label
handle.best_coordinates_so_far = handle.best_coordinates
# write the coordinates to an ASCII file with .tour extension
read_write.coordinates = handle.best_coordinates_so_far
read_write.labels = handle.best_label_so_far
read_write.write_file()
# print handle.best_tour_so_far
# print handle.cost_of_best_tour_so_far
# print handle.best_label_so_far
# print handle.best_coordinates_so_far
# for i in range(len(handle.best_label_so_far)):
# handle.best_label_so_far[i].pos = handle.best_coordinates_so_far
# The following two lines allows to swtich the layout of the graph displayed
layout = CartesianLayout(handle.best_tour_so_far)
# layout = RandomLayout(handle.best_tour_so_far)
# draw the graph
gw = GraphWorld()
gw.show_graph(handle.best_tour_so_far, layout)
gw.mainloop()
def something():
n = 10
p = 1
# create n Vertices
n = int(n)
labels = string.ascii_lowercase + string.ascii_uppercase
vs = [Vertex(c) for c in labels[:n]]
# create a graph and a layout
# g = RandomGraph(vs, p)
g = Graph(vs, [])
g.add_regular_edges(4)
layout = CircleLayout(g)
# draw the graph
gw = GraphWorld()
gw.show_graph(g, layout)
gw.mainloop()
def main():
read_write = TspRW() # create a read_write object
read_write.read_file(
raw_input('Enter file to read from: '
)) # reads all the coordinates of citties from an ASCII file
# solver is an BNB object
solver = BNB(read_write.coordinates)
solver.explore() # explores all the vertex using BNB algorithm
# write the tour in .tour ASCII file
read_write.coordinates = solver.tour
read_write.write_file()
# The following two lines allows to switch the layout of the graph displayed
layout = CartesianLayout(solver.tourGraph)
# layout = RandomLayout(solver.tourGraph)
# layout = CircleLayout(solver.tourGraph)
# draw the graph
gw = GraphWorld()
gw.show_graph(solver.tourGraph, layout)
gw.mainloop()
from Graph import * from GraphWorld import * vs = [Vertex(c) for c in "abcdefgh"] g = Graph(vs) g.add_regular_edges(6) layout = CircleLayout(g) # draw the graph gw = GraphWorld() gw.show_graph(g, layout) gw.mainloop()
def show(self):
# create a graph and a layout
layout = GW.CircleLayout(self)
gw = GW.GraphWorld()
gw.show_graph(self, layout)
gw.mainloop()
def main():
time.clock()
object = TwoOpt() # create a two-opt object
read_write = TspRW() # create a read_write object
read_write.read_file(
raw_input('Enter file to read from: '
)) # reads all the coordinates of citties from an ASCII file
object.labels = read_write.labels # store the labels in a list
object.coordinates = read_write.coordinates # store the coordinates in this list
numRound = int(
raw_input('Enter the number of random graphs you want to generate: '))
roundTimes = int(
raw_input('Enter the number of times you want to swap edges: '))
for i in range(numRound):
object.generate_rand_graph() # generate a random graph
for i in range(roundTimes):
object.generate_rand_vertices(
) # randomly generate two indices which have no common connection
object.find_random_edge(
) # generate two random edges from the given indices
object.find_new_edge() # find the new edge if swap were to happen.
dx_oldtour = object.cal_distance_of_edge(
object.edge1) + object.cal_distance_of_edge(
object.edge2
) # difference in cost before swapping using two-opt
dx_newtour = object.cal_distance_of_edge(
object.new_edge1) + object.cal_distance_of_edge(
object.new_edge2
) # difference in cost after adding two edges.
if dx_newtour < dx_oldtour:
object.remove_edges()
object.add_edge_reversely()
if object.costOfBestTour > object.costOfTour:
bestTour = object.tour
bestTour_vertices = object.tour_vertices
object.costOfBestTour = object.costOfTour
# write the tour in .tour ASCII file
read_write.coordinates = []
read_write.labels = []
for i in bestTour_vertices:
read_write.coordinates.append(i.pos)
for i in bestTour_vertices:
read_write.labels.append(i.label)
read_write.write_file()
print 'Run time: ', time.clock()
# The following two lines allows to switch the layout of the graph displayed
# layout = CartesianLayout(bestTour)
layout = RandomLayout(bestTour)
# layout = CircleLayout(bestTour)
# draw the graph
gw = GraphWorld()
gw.show_graph(bestTour, layout)
gw.mainloop()
def draw_graph(g):
# draw the graph
layout = CircleLayout(g)
gw = GraphWorld()
gw.show_graph(g, layout)
gw.mainloop()
def add_random_edges(self, prob):
'''Starting with an edgeless graph, for every pair of nodes, add an edge with probability prob'''
for edge in self.edges():
self.remove_edge(edge)
for pair in self._all_vert_pairs():
if random.random() < prob:
self.add_edge(Graph.Edge(*pair))
def proportion_connected(num_nodes, prob, num_trials=10):
labels = string.ascii_lowercase + string.ascii_uppercase
for trial in xrange(num_trials):
g = RandomGraph([Vertex(c) for c in labels[:num_nodes]])
g.add_random_edges
if __name__ == '__main__':
import GraphWorld
g = RandomGraph()
for person in ('Brian', 'Morgan', 'David', 'Teresa', 'Corbin', 'Miranda',
'Remy', 'Jordan', 'Heidi'):
g.add_vertex(Graph.Vertex(person))
prob = float(input('connect edges with what probability? [0.0,1.0]'))
g.add_random_edges(prob)
print 'g {} connected!'.format('is' if g.is_connected() else 'is not')
layout = GraphWorld.CircleLayout(g)
gw = GraphWorld.GraphWorld()
gw.show_graph(g, layout)
gw.mainloop()
