Slices data by one dimension, returning a Matrix.
The source data, an array of objects.
The first dimension to slice the data by.
Slices data by two dimensions, returning a Cube.
The second dimension to dice the data by.
Slices data by three or more dimensions, returning a Hypercube.
Two or more other dimensions to pivot the data by.
Slices data by one dimension, returning a Matrix.