Subs function doesn't fully replace the values

I'm testing the subs function and I was wondering why when I use a sin or cos, I don't get the numeric value and instead get this longer version. Also, will it keep getting bigger and bigger if I keep working with that matrix? Here's the code I'm using:

syms X Y Z W

q = [X, Y, Z, W];

q_1 = [1, 2, 3, 4];

phi = [(2*X-W)^2 X^2-2*Y Y*sin(Z)];

J = jacobian(phi,q);

disp(J);

J_1 = J;

J_1 = subs(J, q, q_1);

disp(J_1);

And here it is what is shown in the displays:

[8*X - 4*W, 0, 0, 2*W - 4*X]

[ 2*X, -2, 0, 0]

[ 0, sin(Z), Y*cos(Z), 0]

[-8, 0, 0, 4]

[ 2, -2, 0, 0]

[ 0, sin(3), 2*cos(3), 0]

Answer 1

[VBBV]

syms X Y Z W
q = [X, Y, Z, W];
q_1 = [1, 2, 3, 4];
phi = [(2*X-W)^2 X^2-2*Y Y*sin(Z)];
J = jacobian(phi,q);
disp(J);

J_1 = J;
J_1 = subs(J, q, q_1);
disp(double(J_1));

   -8.0000         0         0    4.0000
    2.0000   -2.0000         0         0
         0    0.1411   -1.9800         0

[VBBV]

Use double for numeric (float) values

[Roberto Toledo Fdez-Cañaveral]

Thank you for the quick answer! I appreciate it!