Count Adjacent Equal Elements in a Vector

Hey guys, I'm very new to matlab. I have been struggling to write a code that counts adjacent equal numbers in a vector and then puts all values in matrix. For example, in a vector like x = [1 3 4 5 1 5 5 4 4 4], count adjacent and equal elements. The result should be like:

    yMatrix = [1 3 4 5 1 5 4
               1 1 1 1 1 2 3]

Answer 1

[Matt J]

   dx=diff([inf,x])~=0;

   yMatrix = [x(logical(dx)) ; ...
              accumarray(cumsum(dx(:)),1).'],