How to reduce data to categories

I have a large double matrix similar to below

testz(1,:)=[325, 325, 325, 269, 369, 369];
testz(2,:)=[3, 2, 5, 2, 6, 9];

and I would like to reduce the data so that the sum of row 2 (3+2+5 and 2+6+9) is shown for each row 1 value, ie.

test_output =

     325   369
      10    17

How can I do that?! Thanks in advance...

Answer 1

[the cyclist]

testz(1,:)=[325, 325, 325, 369, 369, 369];
testz(2,:)=[3, 2, 5, 2, 6, 9];

[uniquez1,~,idx] = unique(testz(1,:)');
sumz2 = accumarray(idx,testz(2,:)');

test_output = [uniquez1,sumz2]'

(It looks like maybe you wrote "269" once, where you meant "369".)

[Jeffrey Hawkes]

yes, you're right. And thanks!