I need to know how to write an appropriate SAS code that would generate the point counts for grid cells. It should have 49 cells using a 7-by-7 grid. Refer to Table 8.2 Algorithm 8.4 Basic grid-based clustering algorithm.

1. Define a set of grid cells.
2. Assign objects to the appropriate cells and compute the density of each cell.
3. Eliminate cells having a density below a specified threshold.
4. Form clusters from contiguous (adjacent) groups of dense cells.