Array Blocks of Different Sizes

The function TakeList allows partitioning a given list into sublists of different lengths. It can also partition a matrix or array into smaller blocks of given dimensions.

Take successively longer sublists from the English alphabet.

Take a 5×6 symbolic matrix.

Separate the rows into two groups of lengths two and three and separate the columns into three groups of length two.

ArrayFlatten reconstructs the original matrix.