Hi everyone,

Suppose I have a matrix:

`a = [12,7;12,5;2,7;23,3;23,43;23,12;3,5;76,21;76,31;4,3;4,7;4,9];`

Then I want to have some sub-divide matrix like following matrixes:

`A = [2,7;3,5;4,9]B = [12,7;12,5;76,21;76,31]C = [23,3;23,43;23,12;4,3;4,7;4,9]`

If first row in matrix a repeated once (e.g. 2-3-4), then that row goes to matrix A If first row in matrix a repeated twice (e.g. 12-76), then that row goes to matrix B If first row in matrix a repeated triple (e.g. 23-4), then that row goes to matrix C …

Repeation frequency is from 1 to 6 times.

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