python绘制折线图--纵坐标y轴截断

python绘制折线图–纵坐标y轴截断

# -*- coding: utf-8 -*-
"""
Created on Wed Dec  4 21:50:38 2019

@author: muli
"""

import matplotlib.pyplot as plt
from pylab import *                 
mpl.rcParams['font.sans-serif'] = ['SimHei'] #支持中文
 
names = ["1","2","3","4","5"]  # 刻度值命名

x = [1,2,3,4,5]    # 横坐标

y3= [2,3,1,4,5]    # 纵坐标
y4= [4,6,8,5,9]    # 纵坐标
y5=[24,27,22,26,28]     # 纵坐标

f, (ax3, ax) = plt.subplots(2, 1, sharex=False)  # 绘制两个子图
plt.subplots_adjust(wspace=0,hspace=0.08) # 设置 子图间距
ax.plot(x, y3, color='red', marker='o', linestyle='solid',label=u'1')   # 绘制折线
ax.plot(x, y4, color='g', marker='o', linestyle='solid',label=u'2')  # 绘制折线

plt.xticks(x, names, rotation=45) # 刻度值
ax3.xaxis.set_major_locator(plt.NullLocator()) # 删除坐标轴的刻度显示

ax3.plot(x, y5, color='blue', marker='o', linestyle='solid',label=u'3')  # 绘制折线
ax3.plot(x, y3, color='red', marker='o', linestyle='solid',label=u'1') # 起图例作用
ax3.plot(x, y4, color='g', marker='o', linestyle='solid',label=u'2') # 起图例作用

ax3.set_ylim(21, 30) # 设置纵坐标范围
ax.set_ylim(0, 10)  # 设置纵坐标范围

ax3.grid(axis='both',linestyle='-.') # 打开网格线
ax.grid(axis='y',linestyle='-.')   # 打开网格线

ax3.legend() # 让图例生效
plt.xlabel(u"λ") #X轴标签
plt.ylabel("mAP") #Y轴标签

ax.spines['top'].set_visible(False)    # 边框控制
ax.spines['bottom'].set_visible(True) # 边框控制
ax.spines['right'].set_visible(False)  # 边框控制

ax3.spines['top'].set_visible(False)   # 边框控制
ax3.spines['bottom'].set_visible(False) # 边框控制
ax3.spines['right'].set_visible(False)  # 边框控制

ax.tick_params(labeltop='off')  

# 绘制断层线
d = 0.01  # 断层线的大小
kwargs = dict(transform=ax3.transAxes, color='k', clip_on=False)
ax3.plot((-d, +d), (-d, +d), **kwargs)        # top-left diagonal

kwargs.update(transform=ax.transAxes, color='k')  # switch to the bottom axes
ax.plot((-d, +d), (1 - d, 1 + d), **kwargs)  # bottom-left diagonal

plt.show()

结果如图所示：