Scatter() 用来画点 plot()用来画线 plt.savefig() 将图表保存
random_walk.py
from random import choice
class RandomWalk():
def __init__(self,num_points=5000):
self.num_points=num_points
self.x_values=[0]
self.y_values=[0]
def fill_walk(self):
while len(self.x_values)<self.num_points:
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
if x_step==0 and y_step==0:
continue
next_x=self.x_values[-1]+x_step
next_y=self.y_values[-1]+y_step
self.y_values.append(next_y)
self.x_values.append(next_x)
rw_visual.py
import matplotlib.pyplot as plt
from random_walk import RandomWalk
while True:
rw=RandomWalk(50000)
rw.fill_walk()
#设置绘图窗口尺寸
plt.figure(figsize=(10,6))
point_numbers=list(range(rw.num_points))
plt.scatter(rw.x_values,rw.y_values,c=point_numbers,cmap=plt.cm.Blues,edgecolors='none',s=1)
#突出起点和终点
plt.scatter(0,0,c='green',edgecolors='none',s=100)
plt.scatter(rw.x_values[-1],rw.y_values[-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()
keep_running=input("make another walk?(y/n)")
if keep_running=='n':
break