如何在Python中使用matplotlib使x轴穿过(0,0)?

本文介绍了如何在Python中使用matplotlib使x轴穿过(0,0)?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

如何让横轴通过原点?

import numpy as np import matplotlib.pyplot as plt rateList=[0,0.08,.1,.12,.15,.175,.225,.25,.275,.3,.325,.35] list1=[-316.8,-424,-2.8,622,658,400,83,16.8,0] NPV_Profile1=[np.npv(x,list1) for x in rateList] list2=[-496,-760,84,1050.4,658,400,83,16.8,0] NPV_Profile2=[np.npv(x,list2) for x in rateList] plt.plot(rateList,NPV_Profile1,rateList,NPV_Profile2) plt.show()

推荐答案

尝试:

import numpy as np import matplotlib.pyplot as plt rateList=[0,0.08,.1,.12,.15,.175,.225,.25,.275,.3,.325,.35] list1=[-316.8,-424,-2.8,622,658,400,83,16.8,0] NPV_Profile1=[np.npv(x,list1) for x in rateList] list2=[-496,-760,84,1050.4,658,400,83,16.8,0] NPV_Profile2=[np.npv(x,list2) for x in rateList] fig, ax = plt.subplots() ax.plot(rateList,NPV_Profile1,rateList,NPV_Profile2) # set the x-spine ax.spines['left'].set_position('zero') # turn off the right spine/ticks ax.spines['right'].set_color('none') ax.yaxis.tick_left() # set the y-spine ax.spines['bottom'].set_position('zero') # turn off the top spine/ticks ax.spines['top'].set_color('none') ax.xaxis.tick_bottom() plt.show()

输出: