MATLAB: Vectorization

reshapevectorization

Let say I have Matrix M with i rows and j columns. And one constant number a is given. Final output Matrix should be N with rows = i * a and column = j / a, and Each column in N should be concatenation of its a columns. Is it possible to get this without loops ?
For example:
M =
     1     3     5     7     9    11
     2     4     6     8    10    12
N with constant a = 2 should be
N =
     1     5     9
     2     6    10
     3     7    11
     4     8    12

Best Answer

N=reshape(M,j*a,j/a)
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