Problem 1852. Repeat middle rows and columns of an array

Solution 860423

Submitted on 1 Apr 2016 by LY Cao

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Test	Status	Code Input and Output
1	Pass	A = randi(100,2); assert(isequal(repmatmid(A),A))
2	Pass	A = magic(3); B_correct = [8 1 1 6; 3 5 5 7; 3 5 5 7; 4 9 9 2]; assert(isequal(repmatmid(A),B_correct))
3	Pass	A = reshape(1:16,4,4); B_correct = [1 5 5 9 9 13; 2 6 6 10 10 14; 2 6 6 10 10 14; 3 7 7 11 11 15; 3 7 7 11 11 15; 4 8 8 12 12 16]; assert(isequal(repmatmid(A),B_correct))
4	Pass	A = eye(5); B_correct = [1 0 0 0 0 0 0 0; 0 1 1 0 0 0 0 0; 0 1 1 0 0 0 0 0; 0 0 0 1 1 0 0 0; 0 0 0 1 1 0 0 0; 0 0 0 0 0 1 1 0; 0 0 0 0 0 1 1 0; 0 0 0 0 0 0 0 1]; assert(isequal(repmatmid(A),B_correct))
5	Pass	A = randi(100,42); B = repmatmid(A); C = diff(B,1,1); D = diff(B,1,2); assert(all(all(C(2:2:end,:)==0))) assert(all(all(D(:,2:2:end)==0)))