I am able to "tessellate" a matrix into 4 smaller matrices by deleting rows and columns as follows:
r= rand(size(P));r1 = r(1:2:end,1:2:end);r2 = r(1:2:end,2:2:end);r3 = r(2:2:end,1:2:end);r4 = r(2:2:end,2:2:end);
But how do I reassemble the matrix to become r again?
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