Hi, I am a new user to CVX. I am trying to model the particular objective function `0.5 * (u(t)^2 + u(t + delta)^2 + ... + u(t + N * delta)^2`

. There are N variables.

I have written my code as

```
function acceleration = control(x0,v0,brake, acc, N, delta, minDist)
cvx_begin
variable x(N);
variable v(N);
variable u(N);
whos
minimize(1/2 * u' * u);
subject to
brake <= u;
u <= acc;
x >= minDist;
x(1) == x0;
v(1) == v0;
for i = 1:N-1
x(i+1) == x(i) + delta * v(i) + 0.5 * delta^2 * u(i);
v(i+1) == v(i) + delta * u(i);
end
cvx_end
end
```

Upon running the code, I get `Error using norm First argument must be single or double. Error in computeControl>control (line 12) norm(brake <= u);`

But, `whos`

is giving the value as `double`

for `brake`

.

I removed `norm`

and I get this

`sqlp stop: dual problem is suspected of being infeasible`

I couldnâ€™t give the give the objective function as `minimize(0.5 * u.^2)`

since I got that the objective function is not scalar error. Any help would be greatly appreciated. Thanks.