MATLAB: 1xn matrix of variables

Question

I need to create a one column matrix F where for n inputs, there are n F values.

For example:

n = 3:

F = F1

F2

F3

I know that I need to create a for loop this but I'm not sure how to do it.

And then I need an if statement saying that for all F(<n), F(<n) = 0 and F(n) = 1000.

In this example, F1 = 0 and F2 = 0, but F3 = 1000.

Answer 1

Just run

n = 3;
F(3) = 1000;

Result

F =
           0           0        1000

It will automatically fill the first two elemets with zero.