Serial Print from for loop

Hi,

I'm trying to send G'Code from a matlab for loop but I keep receiving error messages. I have included my code below which will make much more sense than me trying explaining. Any advice would be greatly appreciated. Thanks!

delete(instrfindall)

prod1 = 'G01 X-2.0 F2';

    if true
      % code
    end
  prod2 = 'G01 X-1.0 F.5';

order = {prod1, prod2};

s=serial('/dev/tty.usbmodemfa141'); %open serial port for x/y traverse
set(s,'BaudRate',115200);
fopen(s);
fprintf(s,'G17 G20 G90 G94 G54')
out=fscanf(s)

dims = ndims(order);
for index = 1:dims

fwrite(s,order(index))

%a= order(index) _> tried this.. doesn't work
%fprintf(s,'%c',a)

%fwrite(s,prod2) -> This works

out=fscanf(s)

fprintf(s,'G4 P5') %pause to collect product
out=fscanf(s)
end

fclose(s)