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"""
===============
Degree Analysis
===============
This example shows several ways to visualize the distribution of the degree of
nodes with two common techniques: a *degree-rank plot* and a
*degree histogram*.
In this example, a random Graph is generated with 100 nodes. The degree of
each node is determined, and a figure is generated showing three things:
1. The subgraph of connected components
2. The degree-rank plot for the Graph, and
3. The degree histogram
"""
import matplotlib.pyplot as plt
import networkx as nx
import numpy as np
G = nx.gnp_random_graph(100, 0.02, seed=10374196)
degree_sequence = sorted((d for n, d in G.degree()), reverse=True)
dmax = max(degree_sequence)
fig = plt.figure("Degree of a random graph", figsize=(8, 8))
# Create a gridspec for adding subplots of different sizes
axgrid = fig.add_gridspec(5, 4)
ax0 = fig.add_subplot(axgrid[0:3, :])
Gcc = G.subgraph(sorted(nx.connected_components(G), key=len, reverse=True)[0])
pos = nx.spring_layout(Gcc, seed=10396953)
nx.draw_networkx_nodes(Gcc, pos, ax=ax0, node_size=20)
nx.draw_networkx_edges(Gcc, pos, ax=ax0, alpha=0.4)
ax0.set_title("Connected components of G")
ax0.set_axis_off()
print("aa")
ax1 = fig.add_subplot(axgrid[3:, :2])
ax1.plot(degree_sequence, "b-", marker="o")
ax1.set_title("Degree Rank Plot")
ax1.set_ylabel("Degree")
ax1.set_xlabel("Rank")
ax2 = fig.add_subplot(axgrid[3:, 2:])
ax2.bar(*np.unique(degree_sequence, return_counts=True))
ax2.set_title("Degree histogram")
ax2.set_xlabel("Degree")
ax2.set_ylabel("# of Nodes")
fig.tight_layout()
plt.show()
class Game:
def __init__(self):
self.snake = Snake(400, 300, 5, 0)
self.enemy = Enemy(100, 100, 3, 1)
self.power_up = PowerUp(200, 200)
def handle_events(self):
for event in pygame.event.get():
if event.type == pygame.QUIT:
return False
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_UP:
self.snake.change_direction(0)
elif event.key == pygame.K_DOWN:
self.snake.change_direction(1)
elif event.key == pygame.K_LEFT:
self.snake.change_direction(2)
elif event.key == pygame.K_RIGHT:
self.snake.change_direction(3)
return True
def update(self):
self.snake.move()
self.enemy.move()
def draw(self, screen):
self.snake.draw(screen)
self.enemy.draw(screen)
self.power_up.draw(screen)
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