Okay so what does this line of code mean: snleg = strtrim(cellstr(num2str(alf_deg.'))); I did some research and it is ultimately removing whitespace (comma's, spaces etc) from a file scanned in, but I don't understand the argument of the function. I don't understand what cellstr is or num2str. I read that it might be to do with cell arrays and they can't or can be modified? I am very confused :sI imagine num2str converts a number to a string value but why do we need to do this? Please note, alf_deg was a variable already initialized in the code. Why do we need a .' in here?