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power of spatial determinant(PSD)

Source: R/psd_spade.R
psd_spade.Rd

Function for calculate power of spatial determinant q_s

Usage

psd_spade(y, x, wt)

Arguments

y

Variable Y, continuous numeric vector.

x

Covariable X, factor, character or discrete numeric.

wt

The spatial weight matrix.

Value

A value of power of spatial determinant q_s.

Details

The power of spatial determinant formula is

\(q_s = 1 - \frac{\sum_{h=1}^L N_h \Gamma_h}{N \Gamma}\)

References

Xuezhi Cang & Wei Luo (2018) Spatial association detector (SPADE),International Journal of Geographical Information Science, 32:10, 2055-2075, DOI: 10.1080/13658816.2018.1476693

Author

Wenbo Lv lyu.geosocial@gmail.com

Examples

data('sim')
wt = sdsfun::inverse_distance_swm(sf::st_as_sf(sim,coords = c('lo','la')),
                                  power = 2)
psd_spade(sim$y,sdsfun::discretize_vector(sim$xa,5),wt)
#> [1] 0.3928036