Combine different matrices to create a new one

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Ali 2016-6-1

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/286773-combine-different-matrices-to-create-a-new-one

评论： Ali 2016-6-2

采纳的回答： Andrei Bobrov

I want to create matrix C, from matrix A and B.

A = (r1 r2 r3)

[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

this is an example:

A= [4 1 6]

B= [4 1

6 8

1 6

1 4

6 1

6 4

4 6]

C= [3 4 6]

Any help would be appreciated.

Thank you very

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Andrei Bobrov 2016-6-1

编辑：Andrei Bobrov 2016-6-1

May be C = [4 3 2]?

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采纳的回答

Andrei Bobrov 2016-6-1

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/286773-combine-different-matrices-to-create-a-new-one#answer_224107

编辑：Andrei Bobrov 2016-6-1

在 MATLAB Online 中打开

A= [4 1 6]
B= [4 1
6 8
1 6
1 4
6 1
6 4
4 6]
K = permute(hankel(A(1:2),[A(2:end),A(1)]),[3,1,2]);
P = repmat(B,1,1,numel(A));
[L1,~] = find(all(bsxfun(@eq,K,P),2));
[L2,~] = find(all(bsxfun(@eq,K(:,end:-1:1,:),P),2));
C = max([L1,L2].') - 1

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Andrei Bobrov 2016-6-2

在 MATLAB Online 中打开

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