as_dgRMatrix_listw: Interface between Matrix class objects and weights lists
In spdep: Spatial Dependence: Weighting Schemes, Statistics and Models

Description Usage Arguments Value Author(s) Examples

Interface between Matrix class objects and weights lists

as_dgRMatrix_listw(listw)
as_dsTMatrix_listw(listw)
as_dsCMatrix_I(n)
as_dsCMatrix_IrW(W, rho)
Jacobian_W(W, rho)

`listw`	a `listw` object created for example by `nb2listw`
`W`	a `dsTMatrix` object created using `as_dsTMatrix_listw` from a symmetric `listw` object
`rho`	spatial regression coefficient
`n`	length of diagonal for identity matrix

Matrix package class objects

Roger Bivand

example(NY_data)
W_C <- as(listw_NY, "CsparseMatrix")
W_R <- as(listw_NY, "RsparseMatrix")
W_S <- as(listw_NY, "symmetricMatrix")
n <- nrow(W_S)
I <- Diagonal(n)
rho <- 0.1
c(determinant(I - rho * W_S, logarithm=TRUE)$modulus)
sum(log(1 - rho * eigenw(listw_NY)))
nW <- - W_S
nChol <- Cholesky(nW, Imult=8)
n * log(rho) + (2 * c(determinant(update(nChol, nW, 1/rho))$modulus))