matplotlib绘制图片错误，纵轴出现很多竖线

Question

感觉代码没啥问题呀，为什么左边的Y轴会出现这么多竖线，应该怎么改？

import pandas as pd
import math
from matplotlib import pyplot as plt

path="result.csv"
tuxiang = pd.read_csv(path, encoding = 'UTF-8')
a=tuxiang.values[:,0]
d=tuxiang.values[:,3]
f=tuxiang.values[:,5]
fig, ax1 = plt.subplots()

color = 'tab:red'
ax1.set_xlabel('time')
ax1.set_ylabel('Porosity', color=color)
ax1.plot(a, d, color=color)
ax1.tick_params(axis='y', labelcolor=color)

ax2 = ax1.twinx() 

color = 'tab:blue'
ax2.set_ylabel('Radius', color=color)
ax2.plot(a, f, color=color)
ax2.tick_params(axis='y', labelcolor=color)

fig.tight_layout() 
plt.show()

Answer 1

可能是csv数据有问题