[R] The spdep package

Hi, Here is a listw object z corresponding to the matrix W. I understand n, nn, S0, S1 and S2 in the weights constants summary. Is it simply so that n1 = n-1, n2 = n-2 and n3 = n-3? If this is true where they are needed? Just wondering Osmo W [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8]

[R] R: the spdep package

Hi, Here is a listw object z corresponding to the matrix W. I understand n, nn, S0, S1 and S2 in the weights constants summary. Is it simply so that n1 = n-1, n2 = n-2 and n3 = n-3? If this is true where they are needed? Just wondering Osmo W [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [1,] 0