spdep (version 0.1-10)

lag.listw: Spatial lag of a numeric vector

Description

Using a listw sparse representation of a spatial weights matrix, compute the lag vector $V x$

Usage

lag.listw(listw, x, zero.policy=FALSE)

Arguments

listw

a listw object created for example by nb2listw

x

a numeric vector the same length as the neighbours list in listw

zero.policy

if TRUE assign zero to the lagged value of zones without neighbours, if FALSE assign NA

Value

• a numeric vector the same length as x

See Also

nb2listw

Examples

data(oldcol)
Vx <- lag.listw(nb2listw(COL.nb, style="W"), COL.OLD$CRIME)
plot(Vx, COL.OLD$CRIME)
require(stepfun)
plot(ecdf(COL.OLD$CRIME))
plot(ecdf(Vx), add=TRUE, col.points="red", col.hor="red")