R: Convert spatial weights list to CSR matrix form

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

Examples

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

[Package spdep version 0.3-13 Index]