How can I have the cumulative sum of the returned values of a function as a vector?

I want to have the cumulative sum of the returned values of AB function in a loop...I want the cumulative sum of the returned values of AB function to form a vector every time it is used. Would you please help me?

for i = 1:P
  for j = 1:L
      for k = 1:(D / 6)
          H = AB (Min{j}(k), Max{j}(k));
      end
   end
end

[Marc Jakobi]

You should provide more information. What is P? What is L? what is D? You said AB is a function? What is it supposed to return?

[Sherwin]

oh, right. P, L and D are just the number of times the loops should be iterated. They are just the dimensions of the answer matrix and can be replaced by numbers like P=50, L=4 and D=48. AB function returns a random number between Min and Max according to the j and k and Min and Max are provided as inputs of the problem.

Answer 1

[Blackadder]

You say you expect a "vector" as a return value. Am I to assume that this vector should have 1 column and P*L*(D/6) rows, or vice versa, respectively?

[Sherwin]

The problem is that I'm not sure about the dimension of the vector, because I don't know for l=1:4 how many times H should be calculated and then I can have H cumulative values of it. The random returned value if AB function specifies that so it can vary for every iteration.

[Blackadder]

So AB can return a vector? Only then would a vector that contains all the H not have the length P*L*(D/6).

And if so, one further question: is there a maximum length to the vector returned by AB?