Read a .txt file character by character

Hey, I would like to read in a file which looks like the above picture. Now this file contains raw data as well as the GNGGA NMEA sentence. I am only interested in this sentence. Unfortunately it also could be that this sentence is spread over two rows. But it alwayse starts with a $ and ends with a *. My problem is I have to read it in not line by line (I managed that already) but character by character if the content is spread over more than one line.

Any ideas (short examples) how I can do that?

Answer 1

[Walter Roberson]

fopen the file. fread(fid, 1, 'uint8=>char') to get one character

However if the file would fit comfortably in memory it would be far more efficient to fileread() the entire file and then search the array, possibly with regexp()

[sqp wow]

Thanks for that suggestion. I will try it.... :)