as_dgRMatrix_listw {spdep}R Documentation

Interface between Matrix class objects and weights lists

Description

Interface between Matrix class objects and weights lists

Usage

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

Arguments

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

Value

Matrix package class objects

Author(s)

Roger Bivand

Examples

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))
[Package spdep version 0.6-11 Index]