Apply Connectivity concept but not on binary matrix

Hi, I have a Matrix

 A=[4 4 4 1 1 0 0;3 3 3 1 1 0 4;3 3 3 2 2 1 1;2 2 2 2 2 1 3]

I want to extract chunks of this matrix, like

 [4 4 4], [1 1;1 1], [0 0], [3 3 3;3 3 3], [2 2 2], [2 2;2 2], [1 1], [1], [3]

etc. I have tried to use diff command. But i am unable to extract anything useful. plz help.

[Cedric]

Did you forget the [4]on the right?

[Cedric]

What defines the priority between rows and columns? You could have extracted

 [2     2     2     2     2 ] and [2   2]

and you extracted

 [2   2   2] and  [2   2;   2   2]

[Walter Roberson]

Are the values integers? Non-negative integers? Do you have the Image Processing Toolkit?