python 实现将多条曲线画在一幅图上的方法

Python  /  管理员 发布于 7年前   243

如下所示：

# -*- coding: utf-8 -*-"""Created on Thu Jun 07 09:17:40 2018@author: yjp"""import matplotlib.pyplot as pltimport numpy as npfrom matplotlib.ticker import MultipleLocator, FormatStrFormattery0 = []y1 = []y2 = []y3 = []y4 = []f = open("y0.txt") lines = f.readlines() for li in lines:   y0.append(li)f = open("y1.txt") lines = f.readlines() for li in lines:    y1.append(li)f = open("y2.txt") lines = f.readlines() for li in lines:    y2.append(li)f = open("y3.txt") lines = f.readlines() for li in lines:    y3.append(li)f = open("y4.txt") lines = f.readlines() for li in lines:   y4.append(li)font1 = {'family' : 'Times New Roman', 'weight' : 'normal', 'size'  : 9, } font2 = {'family' : 'Times New Roman', 'weight' : 'normal', 'size'  : 14, } figsize = 8, 9plt.subplots(figsize=figsize)    # 设定整张图片大小ax1 = plt.subplot(4, 1, 1)ax1.yaxis.set_major_locator(MultipleLocator(15))       # 设定y轴刻度间距#第一条线x = range(0, len(y0))plt.plot(x, y0, color='black', label='$DT$', linewidth=0.8) # 绘制，指定颜色、标签、线宽，标签采用latex格式plt.ylim(-90, -20)          # 设定y轴范围hl=plt.legend(loc='upper right', prop=font1, frameon=False)    # 绘制图例，指定图例位置#set(hl,'Box','off');#第二条曲线x = range(0, len(y1))plt.plot(x, y1, color='red', label='$M_1$', linewidth=0.8)plt.legend(loc='upper right', prop=font1, frameon=False)    # 绘制图例，指定图例位置plt.xticks([])# 去掉x坐标轴刻度plt.xlim(0, 580)           # 设定x轴范围ax2 = plt.subplot(4, 1, 2)ax2.yaxis.set_major_locator(MultipleLocator(15))x = range(0, len(y0))plt.plot(x, y0, color='black', label='$DT$', linewidth=0.8)plt.ylim(-90, -20)hl=plt.legend(loc='upper right', prop=font1, frameon=False)#set(hl,'Box','off');x = range(0, len(y2))plt.plot(x, y2, color='red', label='$M_2$', linewidth=0.8)plt.legend(loc='upper right', prop=font1, frameon=False)plt.ylabel("strength/dBm", font2)plt.xticks([])plt.xlim(0, 580)ax3 = plt.subplot(4, 1, 3)ax3.yaxis.set_major_locator(MultipleLocator(15))x = range(0, len(y0))plt.plot(x, y0, color='black', label='$DT$', linewidth=0.8)hl=plt.legend(loc='upper right', prop=font1, frameon=False)#set(hl,'Box','off');plt.ylim(-90, -20)x = range(0, len(y3))plt.plot(x, y3, color='red', label='$M_3$', linewidth=0.8)plt.legend(loc='upper right', prop=font1, frameon=False)plt.xticks([])plt.xlim(0, 580)ax4 = plt.subplot(4, 1, 4)ax4.yaxis.set_major_locator(MultipleLocator(15))ax4.xaxis.set_major_locator(MultipleLocator(50))x = range(0, len(y0))plt.plot(x, y0, color='black', label='$DT$', linewidth=0.8)plt.ylim(-90, -20)hl=plt.legend(loc='upper right', prop=font1, frameon=False)#set(hl,'Box','off');x = range(0, len(y4))plt.plot(x, y4, color='red', label='$M_4$', linewidth=0.8)plt.legend(loc='upper right', prop=font1, frameon=False)plt.xlabel("index of grids in path", font2)plt.xlim(0, 580)plt.savefig("1.png", dpi=600))plt.show()

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