problem with loading .dat file

I've got a .dat file which I load into my program by such a formula:

fread(FID, 4, 'uint8');
Data  = fread(FID, [1, 4092], 'uint8');
Calib = Data(4:4:end);  % Pierwsza czesc pliku - kalibracja
fread(FID, 4, 'uint8');
Data  = fread(FID, [4096, 204600], 'uint8');
x1 = Data(1:2:204600);

The problem is that after 4092 bytes there're 16 bytes that I need to skip and continue loading the following data. A this happens every 4092 bytes. Is there any way to solve this problem? Will be grateful for any help.

Answer 1

[Walter Roberson]

Use the precision and skip parameters http://www.mathworks.com/help/techdoc/ref/fread.html

'4092*uint8', 16

[Olga]

Thanks a lot. But there's one problem - this cuts only the first 16 bytes after 4092 good ones, but it doesn't cut the rest in the following sequences. Why is that?

[Walter Roberson]

Hmmmm, that is not what "help fread" says should happen. The help information says specifically that the skip will be re-used. Which MATLAB version are you using? I am looking at the information for 2008b and for 2011b.

Side issue: do you perhaps want to be using 'uint8=>uint8' ? Your current code reads uint8 and converts them to double. To keep as uint8 with the skip,

'4092*uint8=>uint8', 16

[Olga]

Exactly help says that it'll skip the value SKIP after each PRECISION value. That's why I don't know why it doesn't.

I'm usin version 2010a version of MATLAB.

Thanks for the last suggestion, I've missed it.