用matlab命令访问每个文件的最后一行？

Question

我有20个文本文件,我想使用matlab循环来获取每个文件的最后一行而不考虑其他行.是否有任何matlab命令来解决这个问题？

Answer 1

您可以尝试的一件事是将文本文件作为二进制文件打开,搜索到文件的末尾,并从文件末尾向后读取单个字符(即字节).此代码将从文件末尾读取字符,直到它遇到换行符(如果在文件的最末端找到换行符,则忽略换行符):

fid = fopen('data.txt','r');     %# Open the file as a binary
lastLine = '';                   %# Initialize to empty
offset = 1;                      %# Offset from the end of file
fseek(fid,-offset,'eof');        %# Seek to the file end, minus the offset
newChar = fread(fid,1,'*char');  %# Read one character
while (~strcmp(newChar,char(10))) || (offset == 1)
  lastLine = [newChar lastLine];   %# Add the character to a string
  offset = offset+1;
  fseek(fid,-offset,'eof');        %# Seek to the file end, minus the offset
  newChar = fread(fid,1,'*char');  %# Read one character
end
fclose(fid);  %# Close the file