I have a point (or a cell) on a larger matrix, C, and I have created a "search radius" around this point of 40 cells in all directions such that the encompassing matrix representing the search radius is composed of 1681 cells (which includes the point). To better explain what I want to do, let's say that each cell represents an area of 30 m by 30 m. I want to re-sample this search radius so that the cell size is now 120 m by 120 m, so I would essentially be aggregating 16 cells in the original search radius into one super cell. I think this is do-able because 1680 cells* 30 meters =50400 meters, and this is then divisible by 120. The only problem that I foresee is not including the point itself in the resampling. Is this possible? and how can I then extract the indices of the 16 original smaller cells that make up the larger one?