Logical indeexing and finding the corresponding value at a particular instance

This is what I have:

- One cell array, lets call it test:

      A 1 2 
      B 2 3 
      C 3 4 
      D 4 5

- Another cell array, lets call it test_2:

      Q 2 3 
      R 3 4 
      T 3 3 
      U 4 3

- What I need to get is a vector. And I am trying to do this in a loop, if test(:,2)> test_2{a,2} then test(:,4)=test_2{:,1} at that instance. I am appending test with a 4th column.

- Basically, I am trying to find when one column becomes greater than the other and find the corresponding adjacent row value at that instance.

Thank you!

[Ariel]

Or I should say if test(:,2)> test_2{a,2} then test(a,4)=test_2{a,1} since I am trying to do this in a loop

[dpb]

test(:,2)> test_2{a,2}

What's a? There's nothing of that identifier in sight.

Mayhaps showing what you expect output to be for the input would help...