Creating Identity Vectors Using FOR Loop

I have a homework assignment where I need to solve something much larger than I am asking, but I am having trouble with how I want to start it off. I need to use the vectors of an Identity Matrix to solve for a matrix A.

I want to create these vectors [1; 0; 0; 0], [0; 1; 0; 0], ... as 1 moves down the vector in each one produced. I tried using a FOR loop for this and it did not work. I tried using:

    I = zeros(4,1);

    for k = 1:4

        I(k,1) = 1;

    end

Now, when I do this, it creates [1; 0; 0; 0], [1; 1; 0; 0], ... [1; 1; 1; 1] and I end up with an all 1 4x1 vector. I don't know how to make this work, and I cannot move on to the rest of the assignment without this part.

[David Fletcher]

Could try

eye(4)

[JENIZA CHALA]

I had originally used that and just separated the matrix, but she wants a for loop creating the separate vectors of the identity matrix.

[David Fletcher]

I = zeros(4,4);
    for k = 1:4
        I(k,k) = 1;
    end

Answer 1

[David Fletcher]

Or if you really wanted to make them all totally separate...

      A = zeros(1,4);
      B = zeros(1,4);
      C = zeros(1,4);
      D = zeros(1,4);

      for k = 1:4
          switch k
              case 1
                  A(1,1) = 1
              case 2
                  B(1,2) = 1
              case 3
                  C(1,3) = 1
              case 4
                  D(1,4) = 1
          end

      end