Hello I have a problem with my code in matlab: I want to enter a archive in the >>here<< section as you can see in a cycle: code: file=dir('C:\Users\fyre\Documents\funciones\logs'); %directory files=strvcat(file.name); % I got the archives that a I need k=1; D=[]; for i=3:5 system('mseed2sac-2.1-win32 >>here<>') end but in each cycle i only get: system('mseed2sac-2.1-win32 >>here<>') before due to the quotes, we know that here have to change archive in each interation..