Would this work:
fid = fopen(FileName, 'r');
if fid == -1, error('Cannot open file: %s', FileName); end
Data = fscanf(fid, '{%g, %g}', 128*128); % Edited: fid inserted
fclose(fid);
The wanted output format is not clear: What should the other 2 elements of M contain and how do you want to store the 128*128 M's?
If you append an example file or at least some lines of the file as text, testing a suggestion would be easier.
