Error in storing the values from a loop to a matrix

I am getting error while storing values of loop .

iterations = 10;
t = zeros(2,iterations);

      for i = 1:iterations
          theta1 = t(1) + 3;
          theta2 = t(2) + 5;
          t(1) = theta1;
          t(2) = theta2;
          t(1,i) = theta1;
          t(2,i) = theta2;

      end
  disp(t)

I should have got 3 and 5 in the first column. But i am getting 30 and 50

Answer 1

[Walter Roberson]

No, the result you got was what you programmed. Remember that linear indexing goes down columns. Your code is exactly equivalent to

iterations = 10;
t = zeros(2,iterations);
      for i = 1:iterations
          theta1 = t(1,1) + 3;
          theta2 = t(2,1) + 5;
          t(1,1) = theta1;
          t(2,1) = theta2;
          t(1,i) = theta1;
          t(2,i) = theta2;
      end
  disp(t)

Notice that you keep writing new values into t(1,1) and t(2,1), continually adding 3 or 5 to them. The end result is going to be 3 * iterations or 5 * iterations.