spvar: spatial variance

In sdsfun: Spatial Data Science Complementary Features

spatial variance

Description

spatial variance

Usage

spvar(x, wt, method = c("cpp", "r"))

Arguments

x	A numerical vector .
wt	The spatial weight matrix.
method	(optional) The method for calculating spatial variance, which can be chosen as either cpp or r. Default is cpp.

Details

The spatial variance formula is \Gamma = \frac{\sum_i \sum_{j \neq i} \omega_{ij}\frac{(y_i-y_j)^2}{2}}{\sum_i \sum_{j \neq i} \omega_{ij}}

Value

A numerical value.

Examples

gzma = sf::read_sf(system.file('extdata/gzma.gpkg',package = 'sdsfun'))
wt1 = inverse_distance_swm(gzma)
spvar(gzma$PS_Score,wt1)

sdsfun documentation built on April 3, 2025, 8:39 p.m.