MATLAB: How to use fread to read little endian data

freadMATLABwhile loop

I have a .jsf file that I am trying to read which starts off with a 16 byte common message header followed by a 240 byte message 80 specific header and then the data that I am interested in. This data changes for each row of the file. EX) row 7 = 4496 bytes, row 8 = 18704 bytes. If I want to read this data row by row, would I need to use a fseek to position myself 256 bytes into the data to start reading the 4496 bytes or the 18704 bytes and then loop it until the end of the file? The data I am reading will then be fed through image().
FileID = fopen('FileName', 'rb')
while ~feof(FileID)
    tline = fgetl(FileID)
    Start = fseek( tline, 256, 'cof')
    Read = fread(Start)
end

Best Answer

I would seek first (outside the while loop).
Depending on your data, fgetl may not make sense (files read by bytes don't have end-of-lines). I would think just using fread would do it. You do need to know what the precision is. For example, this will read 4 bytes as a float32.
data1 = fread(fid,1,'float32');
See this post for more details.
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