How can I read arbitrary files using only position offsets?

I'm trying to read a file formatted without a file extension. It contains a few bytes of information at the start, then contains a very long (in the tens of millions) sequence of unsigned integers between 0 and 255. My end goal is importing this sequence in to matlab.

I've tried using fopen and the memory mapped file functions but they don't seem to be what I need.

[Walter Roberson]

The unsigned integers, are they in text format or in single-byte binary ?

[Jacob]

Binary, can't be gainfully opened in a text editor.

Answer 1

[Walter Roberson]

fid = fopen('YourFile.bin', 'r');    %not 'rt' !!
fseek(fid, 1024, 'bof');       %move to offset 1024, where 0 is the first byte of the file
abc = fread(fid, 2, '*uint8');   %read two bytes
fseek(fid, 9875, 'bof');       %move somewhere else
def = fread(fid, 17, '*uint8');

and so on.