losh: Local spatial heteroscedacity

In sfdep: Spatial Dependence for Simple Features

Local spatial heteroscedacity

Description

Local spatial heteroscedacity

Usage

losh(x, nb, wt, a = 2, ...)

losh_perm(x, nb, wt, a = 2, nsim = 499, ...)

Arguments

x	a numeric vector.
nb	a neighbor list for example created by st_contiguity()
wt	a weights list for example created by st_weights()
a	the exponent applied to the local residuals
...	methods passed to spdep::LOSH
nsim	number of simulations to run

Value

a data.frame with columns

• hi: the observed statistic

• e_hi: the sample average

• var_hi: the sample variance

• z_hi the approximately Chi-square distributed test statistic

• x_bar_i: the local spatially weight mean for observation i

• ei: residuals

Examples

nb <- st_contiguity(guerry)
wt <- st_weights(nb)
x <- guerry$crime_pers
losh(x, nb, wt)
losh(x, nb, wt, var_hi = FALSE)
losh_perm(x, nb, wt, nsim = 49)

sfdep documentation built on Sept. 13, 2024, 5:07 p.m.