0X08随机漫步代码

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()

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转载自www.cnblogs.com/aaron456-rgv/p/12617318.html
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