from random import choice import matplotlib.pyplot as plt ''' 随机漫步实验 ''' class RandomWalk(object): '''一个生成随机漫步数据的类''' def __init__(self,num_points=5000): self.num_points = num_points #所有随机漫步都始于(0,0) x_values = [0] y_values = [0] def fill_walk(self): #不断漫步,直到列表达到指定长度 while len(self.x_values) < self.num_points: #决定前进方向以及沿这个方向前进的距离 x_direction = choice([1,-1]) x_distance = choice([0,1,2,3,4]) x_step = x_direction * x_distance y_direction = choice([1,-1]) 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 #计算下一个点的x 和 y值 next_x = self.x_values[-1] + x_step next_y = self.y_values[-1] + y_step self.x_values.append(next_x) self.y_values.append(next_y) ''' 绘制随机漫步图 ''' if __name__ == "__main__": rw = RandomWalk() rw.fill_walk() plt.scatter(rw.x_values,rw.y_values,s=15) plt.show()