Not only is your code full of syntax errors, the entire concept seems pointlessly complex. Why do you need a loop at all? Is there a reason why you want to avoid simply calling the function with a vector?:
>> fun = @sin;
>> vec = [0,pi/2,pi,3*pi/2,2*pi];
>> fun(vec)
ans =
0.00000 1.00000 0.00000 -1.00000 0.00000
Note that the function arrayfun probably does exactly what you are trying to do, but even using arrayfun is likely superfluous if your functions are vectorized (like sin is).
