rw_visual.py
import matplotlib.pyplot as plt
from random_walk import RandomWalk
#只要程序处于活动状态,就不断地模拟随机漫步
while True:
#创建一个RandomWalk实例,并将其包含的点都绘制出来
rw = RandomWalk()
rw.fill_walk()
point_numbers = list(range(rw.num_points))
current_axes = plt.axes()
current_axes.xaxis.set_visible(False)
current_axes.yaxis.set_visible(False)
"""隐藏坐标代码中,须将plt.axes()赋给一个变量,get_xaxis,get_yaxis要改为xaxis,yaxis,否则程序无效"""
"""还有就是set_visible(False)要放在plt.scatter之前,否则就不能绘制出点图"""
plt.scatter(rw.x_values,rw.y_values,c = point_numbers, cmap = plt.cm.Blues,edgecolor = 'none',s = 15)
#plt.scatter(rw.x_values,rw.y_values,s=15)
#起点
plt.scatter(0,0,c = 'green',edgecolor = 'none',s =100)
"""(0,0)表示起点坐标"""
#终点
plt.scatter(rw.x_values[-1],rw.y_values[-1],c='red',edgecolor = 'none',s = 100)
"""(rw.x_values[-1],rw.y_values[-1])表示终点坐标"""
#plt.axes().get_xaxis.set_visible(False)
#plt.axes().get_yaxis.set_visible(False)
#原始代码
plt.show()
keep_running = input("Make another walk?(y/n):")
if keep_running == 'n':
break
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random_walk.py
from random import choice
class RandomWalk():
"""一个生成随机漫步数据的类"""
def __init__(self,num_points = 5000):
"""初始化随机漫步的属性"""
self.num_points = num_points
#所有随机漫步都始于(0,0)
self.x_values = [0]
self.y_values = [0]
def fill_walk(self):
"""计算随机漫步包含的所有点"""
# 不断漫步,直到列表达到指定的长度
while len(self.x_values) < self.num_points:
#决定前进方向以及沿着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([0,1,3,5,7])
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)