I have AB matrix that contains 3000×2000 grids data.

`AB = (1,1) (1,2) (1,3) (1,4) ... (1,3000) (2,1) (2,2) (2,3) (2,4) ... (2,3000) (3,1) (3,2) (3,3) (3,4) ... (3,3000) (4,1) (4,2) (4,3) (4,4) ... (4,3000) (5,1) (5,2) (5,3) (5,4) ... (5,3000) ... ... ... (2000,1)`

I want to calculate (MAX-MIN) value for each 3×5 grids in matrix AB

For Example :

If target grid is (3,2), I use 15 grids data (1~5,1~3) for calculation of MAX and MIN.

And if MAX is (1,1) and MIN is (2,3), then (MAX-MIN) at (3,2) is ((1,1)-(2,3)).

In the same way, if target grid is (3,3), I use (1~5,2~4).

Can you help me to make automatic script to calculate this??

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