calculating sum of an array by using if-or statement in matlab

Hi, I want to calculate the sum of some array elements in matlab by using if-or statement or by using any other code. My inputs are shown in below.

    Deger      Node1       Node2
      20        1           2
      25        2           5
      27        5           6
      28        6           7
      31        7           4
      32        4           3
      33        3           2
      34        3           6

I want to identify same values (max=7) in node1 and node 2 and calculate the sum of Deger values corresponding to that values. For example for 1, we have only 20 for değer. so value=20. For 2, we have 3 values 20,25,33. so the sum is 78. For 3, we have 32,33,34 so value=32+33+34=99. How can I wrote this code in matlab ? Thanks for your help.

Answer 1

[Torsten]

Deger = [20 25 27 28 31 32 33 34];
Node1 = [1 2 5 6 7 4 3 3];
Node2 = [2 5 6 7 4 3 2 6];
minimum = min(min(Node1),min(Node2))
maximum = max(max(Node1),max(Node2))
result = NaN(maximum-minimum+1,1);
for i=minimum:maximum
  result(i+1-minimum) = sum(Deger(find(Node1==i|Node2==i)));
end
result

[Gokhan Kayan]

Thanks torsten it is fabuluous :)