How do you get the size of a file in MATLAB?

Question

What is the best way to figure out the size of a file using MATLAB? The first thought that comes to mind is size(fread(fid)).

Answer 1

The question seems to indicate that fopen/fread/.. is used. In this case, why not seeking to the end of the file and reading the position?

Example:

function file_length = get_file_length(fid)
% extracts file length in bytes from a file opened by fopen
% fid is file handle returned from fopen

% store current seek
current_seek = ftell(fid);
% move to end
fseek(fid, 0, 1);
% read end position
file_length = ftell(fid);
% move to previous position
fseek(fid, current_seek, -1);

end

Matlab could have provided a shortcut..

More on ftell can be found here.