MATLAB: Creating Identity Vectors Using FOR Loop

MATLAB

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 4×1 vector. I don't know how to make this work, and I cannot move on to the rest of the assignment without this part.

Best Answer

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
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