spdep (version 0.2-9)

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(x, var, zero.policy=FALSE, ...)

Arguments

x

a listw object created for example by nb2listw

var

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

...

additional arguments

Value

• a numeric vector the same length as var

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")