lag.listw

0th

Percentile

Spatial lag of a numeric vector

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

Keywords
spatial
Usage
"lag"(x, var, zero.policy=NULL, NAOK=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
default NULL, use global option value; if TRUE assign zero to the lagged value of zones without neighbours, if FALSE assign NA
NAOK
If 'FALSE', the presence of 'NA' values is regarded as an error; if 'TRUE' then any 'NA' or 'NaN' or 'Inf' values in var are represented as an NA lagged value.
...
additional arguments
Value

a numeric vector the same length as var

See Also

nb2listw

Aliases
  • lag.listw
Examples
data(oldcol)
Vx <- lag.listw(nb2listw(COL.nb, style="W"), COL.OLD$CRIME)
plot(Vx, COL.OLD$CRIME)
plot(ecdf(COL.OLD$CRIME))
plot(ecdf(Vx), add=TRUE, col.points="red", col.hor="red")
is.na(COL.OLD$CRIME[5]) <- TRUE
VxNA <- lag.listw(nb2listw(COL.nb, style="W"), COL.OLD$CRIME, NAOK=TRUE)
Documentation reproduced from package spdep, version 0.6-9, License: GPL (>= 2)

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