\(L = I - D^{-1/2} A D^{-1/2}\) (normalised) or \(D - A\)
(unnormalised).
Usage
morie_gtrf_laplacian(adj, n, normalized = TRUE)
Arguments
- adj
Adjacency list.
- n
Number of nodes.
- normalized
Use the symmetric normalised Laplacian.
Value
Square numeric matrix.
References
Belkin, M. and Niyogi, P. (2003).
Examples
adj <- list(`0` = 1L, `1` = c(0L, 2L), `2` = 1L) # path graph, 0-based ids
morie_gtrf_laplacian(adj, n = 3, normalized = FALSE)
#> [,1] [,2] [,3]
#> [1,] 1 -1 0
#> [2,] -1 2 -1
#> [3,] 0 -1 1
