Campus Livre
feof
Tests whether the read position is at the end of a file.
Category: Data Import and Analysis > Data Import and Export
Syntax
tf = feof(fid)Returns true once a read has hit the end of the file.
Description
The usual use is a read loop: while ~feof(fid). The indicator is set by a read that reaches the end, not merely by sitting at the last byte, so the loop reads every line, including a last line with no trailing newline.
Input arguments
fid- File identifier from
fopen.
Output arguments
tf- Logical scalar.
Example
Read a file line by line
fid = fopen('w.txt', 'w');
fprintf(fid, 'alpha\nbeta\ngamma');
fclose(fid);
fid = fopen('w.txt');
while ~feof(fid)
fprintf('[%s]\n', fgetl(fid));
end
fclose(fid);Output
[alpha]
[beta]
[gamma]