asMatrixCsrListw {spdep}R Documentation

Convert spatial weights list to CSR matrix form

Description

asMatrixCsrListw creates a matrix.csr from a listw object, asMatrixCsrIrW is a helper function used in fitting SAR models and elsewhere to make a (I - rho W) matrix.csr object from W; asListwMatrixCsr performs the reverse conversion from matrix.csr to listw object.

Usage

asMatrixCsrListw(listw)
asMatrixCsrIrW(W, rho)
asMatrixCsrI(n)
asListwMatrixCsr(mcsr)

Arguments

listw a listw object created for example by nb2listw
W a matrix.csr object created using asMatrixCsrListw from a listw object
rho spatial regression coefficient
n length of diagonal for identity matrix
mcsr a matrix.csr object

Value

asMatrixCsrListw and asMatrixCsrIrW return matrix.csr objects; asListwMatrixCsr returns a listw object

Author(s)

Roger Bivand Roger.Bivand@nhh.no

See Also

as.matrix.csr

Examples

data(oldcol)
COL.W <- nb2listw(COL.nb, style="W")
COL.W
image(asMatrixCsrListw(COL.W))

[Package spdep version 0.3-12 Index]