How to convert a 2D matrix to a 3D matrix without for cycles?

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Mr M.
Mr M. 2018-4-5
回答： Adam 2018-4-5
Suppose we have a 2D matrix (M2) and we want to create 3D matrix (M3) from it with the following definition: M3(n,k,j) = M2((k-1)*J+j,n), where n=1:N, j=1:J, k=1:K

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Adam
Adam 2018-4-5
M3 = permute( reshape( M2', N, J, K ), [1 3 2] );
should do it I think, though there may be neater ways!

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