how to get a matrix of the form from a given matrix, for exapmle
a= [2 3 4 5 6 7 8 9 0] i want a matrix where in each elements are repeated in other matrix as follows b= [2 2 3 3 4 4 2 2 3 3 4 4 5 5 6 6 7 7 5 5 6 6 7 7 8 8 9 9 0 0 8 8 9 9 0 0]
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