matplotlib作图--同x轴双y轴

来源：互联网发布：osek网络管理有什么用编辑：程序博客网时间：2024/05/16 09:35
#!/usr/bin/env python2.7# -*- coding: utf8 -*-"""Purpose: File: /home/cz/Program/eclipse/GP/efficiency_factor.pyAuthor: CHANG ZhiDate: 2014-12-24E-mail: """import osimport numpy as npimport matplotlib.pyplot as pltdatafile = 'data/abc.dat'if(os.path.isfile(datafile)):    cat = np.genfromtxt(datafile,delimiter="")    bars,factor,evts= cat[:,0],cat[:,1],cat[:,2]else:    print datafile,' do not exist.\n'    exit(0)#host = plt.subplots()fig,left_axis=plt.subplots()#fig.subplots_adjust(right_axis=0,75)right_axis = left_axis.twinx()p1, = left_axis.plot(bars, abs(factor), 'b.-')p2, = right_axis.plot(bars, evts/(5000000*(3*np.sqrt(3)/(2*np.pi))), 'r.-')left_axis.set_xlim(40,410)#left_axis.set_xticks(np.arange(0,110,10))left_axis.set_ylim(0.265,0.355)left_axis.set_yticks(np.arange(0.27,0.36,0.01))#right_axis.set_ylim(0,0.26)#right_axis.set_yticks(np.arange(0,0.26,0.02))left_axis.set_xlabel('Bar Number in One Edge')left_axis.set_ylabel('Modulation Factor')right_axis.set_ylabel('Efficiency')left_axis.yaxis.label.set_color(p1.get_color())right_axis.yaxis.label.set_color(p2.get_color())tkw = dict(size=5, width=1.5)left_axis.tick_params(axis='y', colors=p1.get_color(), **tkw)right_axis.tick_params(axis='y', colors=p2.get_color(), **tkw)left_axis.tick_params(axis='x', **tkw)plt.savefig('fig/abc.eps')plt.show()
0 0