MATLAB: How to modify this code for combining matrices

Question

I want to use matrix A and B to create matrix C.

I would like to modify my code to work well for this problem.

Any help and suggestion is appreciated.

A = (r1 r2 r3)

B=

[r1 r2

r3 r4

r2 r1

r5 r6

r2 r3

r3 r2

r3 r1

r1 r3]

C=(s1 s2 s3)

Matrix A and matrix C have the same size.

s1, s2, s3 are row’s number in matrix B. The row’s number in matrix B start from 0.

s1= bigger row’s number between r1 r2 and r2 r1

s2= bigger row’s number between r2 r3 and r3 r2

s3= bigger row’s number between r3 r1 and r1 r3

Answer 1

[m,n] = size(A);
Y1 = reshape(permute(cat(3,A,circshift(A,[0 -1])),[3,2,1]),2,[]); % 
Y2 = flip(Y1,1);
Bp = permute(B,[2,3,1]);
X = reshape(any([all(bsxfun(@eq,Y1,Bp));all(bsxfun(@eq,Y2,Bp))]),m*n,[])';
C = reshape(max(bsxfun(@times,X,(1:size(B,1))')),[],m)'-1;