grid[*A, B] counts grid[numClusters] sums grid[numClusters, B] number of clusters in the output. this is also defines the range of indices that can be used in the inlet 0 grid. grid[*A, 1] of values that refer to cluster indices. this is what is sent to inlet 2 dummy (convert to grid) there are 2 samples numbered 0 there are 4 samples numbered 1 there is no sample numbered 2 there is one sample numbered 3 average of (0 0) and (666 242) average of (10 10), (400 0), (100 50), (50 100) average of no values. nominally 0, technically undefined. average of (100 200). average of one sample is that sample. defaults to () for the sake of having a default value.