MATLAB: Detemine subtraction result

subtraction

Hi, suppose I have two matrix A and B as follows:
A =
     1     2     3
     3     3     6
     4     6     8
     4     7     7
B =
     2     2     3
     2     3     6
     4     6     2
     4     7     2
I need the subtraction result of value of A from a particular value say 12 where value of B is 2. i.e 12 minus values of the positions : (1,1) (1,2)(2,1)(3,3)(4,3) are 11, 10,9,4,5 respectively.
is there any easy way to do this?

Best Answer

12 - A(B==2)
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