from random import choice
class RandomWalk:
def __init__(self, num_points=1000):
# 随机漫步的最大距离
self.num_poimts = num_points
# 随机漫步的'脚步'
self.x = [0]
self.y = [0]
def fill_walk(self):
"""生成随机漫步的脚印"""
while len(self.x) < self.num_poimts:
# 前进方向
x_direction = choice([1, -1])
# 前进的距离
x_distance = choice([0, 1, 2, 3, 4])
x_step = x_direction * x_distance
# 前进方向
y_direction = choice([1, -1])
# 前进的距离
y_distance = choice([0, 1, 2, 3, 4])
y_step = y_direction * y_distance
# 拒绝原地踏步
if x_step == 0 and y_step == 0:
continue
# 生成下一步
next_x = self.x[-1] + x_step
next_y = self.y[-1] + y_step
self.x.append(next_x)
self.y.append(next_y)
import matplotlib.pyplot as plt
from random_walk import RandomWalk
rw = RandomWalk()
rw.fill_walk()
point_num = list(range(rw.num_poimts))
plt.scatter(rw.x, rw.y, c=point_num, cmap=plt.cm.Blues, edgecolors='none', s=15)
# 突出起点和终点
plt.scatter(0, 0, c='green', edgecolors='none', s=100)
plt.scatter(rw.x[-1], rw.y[-1], c='red', edgecolors='none', s=100)
# 隐藏坐标轴
plt.axes().get_xaxis().set_visible(False)
plt.axes().get_yaxis().set_visible(False)
plt.show()
