How can I shift rows and columns, and also replicating Sub matrixes.

First question, I have a 4x4 magic matrix, A. I want to create a new matrix D by shifting the rows in matrix A down by one, and by shifting the columns left by 2. What would follow D= ?

Second question I have a 2x2 matrix B. I want to create a 4x4 matrix by replicating B 4 times. How would I go about doing that?

Answer 1

[Azzi Abdelmalek]

A=reshape(1:16,4,4) ,  % First example
A=circshift(A,[1 0]) % Shift down by 1
A=circshift(A,[0 -2]) % Shift left by 2

B=[1 2;3 4]  % Second example
B=repmat(B,2,2);

Answer 2

[David Sanchez]

A = magic(4);
D = [A(end,:); A(1:end-1,:)]; % shift rows down
D = [D(:,3:end) D(:,1:2)]; % shift colums leftx2

B = rand(2); %2x2 matrix
G = [B B; B B];%4x4 matrix by replicating B 4 times

[shivs]

How would you shift rows up

Answer 3

[Andrei Bobrov]

A = magic(4);
D = circshift(A,[1,2]);

B = randi(10,2);
out = kron(ones(2),B);