Gathering data in for loop

I would like to call B04 matrix after running the code. For example, I would like to use B04 matrix from the third iteration and B04 matrix from the fourth iteration but I don't know how to code it. In the for loop, only B04(1,4) and B04(2,4) change in the for loop.

    t= linspace(0,2*pi,42);

    B04 = [1 0 0 6.5+3.5; 0 1 0 0; 0 0 1 0 ;  0 0 0 1];

    B04_initial = B04;

    B = [0 0 0 ; 0 0 0 ; 1 1 1];

    q_0_raw = rda_planar_RRR(dh,B04_initial);

    q_initial = [q_0_raw(1,2) q_0_raw(1,3) q_0_raw(1,4)];

    q = q_initial;

    timer = 0;

    delS = zeros(4,1);

    J = zeros(6,3);

    for i = t;

        B04(1,4) = 6.5+3.5*cos(i);

        B04(2,4) = 0+3.5*sin(i);

        B04(i) = [1 0 0 B04(1,4);0 1 0 0+B04(2,4); 0 0 1 0 ; 0 0 0 1]
    end