How do I find the size of a file on disk from MATLAB?

I would like to find the size of a file on disk from MATLAB.

Answer 1

[MathWorks Support Team]

There are two ways to have your program determine the size of a file:

%-- METHOD #1 --                    

s = dir('myfile.dat');         

filesize = s.bytes             

%-- METHOD #2 --

fid = fopen('myfile.dat');

fseek(fid, 0, 'eof');

filesize = ftell(fid)

fclose(fid);

The dir function also returns the filename (s.name), last modification date (s.date), and whether or not it is a directory (s.isdir). (The second method requires read access to the file.)