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| You could try: transform[a_] := Map[Flatten] @* Transpose @* Map[p |-> Partition[p, Dimensions[a][[1]]]]@a Though, for larger matrices it wouldn't perform well. For starters, the composite `@*` operator is not too fast nor does invoking... |
| See also Chapter 6 on Computations with Infinite Structures in [The Mathematica Programmer][1] by Roman Maeder. [1]: http://www.wolfram.com/books/profile.cgi?id=3776 |
| Oops, didn't read the first response well enough. |