poster
2019-12-10, 20:41
我有20个文本文件，并且我想使用matlab循环来获取每个文件的最后一行，而不考虑其他行。有没有matlab命令来解决这个问题？
回答：
您可以尝试做的一件事是将文本文件作为二进制文件打开，查找到文件末尾，然后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，直到命中换行符为止（如果在文件末尾找到换行符，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
更多&回答... (https://stackoverflow.com/questions/2659375)
回答：
您可以尝试做的一件事是将文本文件作为二进制文件打开，查找到文件末尾，然后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，直到命中换行符为止（如果在文件末尾找到换行符，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
更多&回答... (https://stackoverflow.com/questions/2659375)