In this recipe, we explore BlockMatrix, which is a nice abstraction and a placeholder for the block of other matrices. In short, it is a matrix of other matrices (matrix blocks) which can be accessed as a cell.
We take a quick look at a simplified code snippet by converting the CoordinateMatrix to a BlockMatrix and then do a quick check for its validity and access one of its properties to show that it was set up properly. BlockMatrix code takes longer to set up and it needs a real life application (not enough space) to demonstrate and show its properties in action.
