Converting continuous time to discrete time with zero order hold

I am having trouble trying to figure out c2d. I have a continuous time system x_dot = Ac*x + Bc*u. y = Cx + Du

I need to convert this into a discrete time system with a zero order hold.

Also it can only be done in matlab. I am not allowed to use simulink.

%initial input
Ac = [0 0 0 1 0 0;
      0 0 0 0 1 0;
      0 0 0 0 0 1;
      -2 1 0 -1.6 0.8 0;
      1 -2 1 0.8 -1.6 0.8;
      0 1 -1 0 0.8 -0.8];          

Bc = [0 0 0;
      0 0 0;
      0 0 0;
      1 0 0;
      0 1 0;
      0 0 1];

C = [1 0 0 0 0 0;
     0 1 0 0 0 0;
     0 0 1 0 0 0;
     0 0 0 1 0 0;
     0 0 0 0 1 0;
     0 0 0 0 0 1];

D = 0;

%Initial x value
X0 = [1 2 3 0 0 0]';

%covariance
w = 0.2*eye(3);

Answer 1

[Sabin]

This can be done using [Ad,Bd,Cd,Dd] = c2dm(Ac,Bc,C,D,Ts,'zoh')