本代码读取了一个两列的txt文本文件，对其中数据进行处理画图后，并用csv格式输出：
#!/usr/bin/pythonimport numpy as npimport matplotlib.pyplot as plt import csv#plt.rc('font',family='Times New Roman')x=[]y=[]xcorr=[]ycorr=[]with open('Cd.out','r') as data:for line in data:p = line.split()x.append(float(p[0]))y.append(float(p[1]))for i in range(len(x)):x[i] = x[i]*96.1/(0.00005*0.33333)y[i] = y[i]/0.33333/0.33333if (x[i]>40):xcorr.append(x[i])ycorr.append(y[i])with open("Cd_corr.csv","w") as outfile:writer = csv.writer(outfile,delimiter = '\t')writer.writerows(zip(xcorr,ycorr))plt.figure(num=1, figsize=(8,6))plt.rc('text',usetex=True)plt.rc('font',family='serif')plt.title('Time-averaged overall HTC', size=14)plt.xlabel(r"tU/d",size = 14)plt.ylabel('Cd', size=14)plt.plot(xcorr, ycorr, 'r', label='Present study')plt.legend(loc='center right')plt.savefig('post_cd.png', format='png',dpi=300)
注意：csv用excel打开数据都在第一列，解决办法为CSV保存时设置了一定的分隔符号，在Excel中打开文件，选中第一列，点击菜单栏–数据–分列–分隔符号.。原文参考自：//10/excel+csv/
