power of spatial determinant(PSD)

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 = inverse_distance_weight(sim$lo,sim$la,power = 2)
psd_spade(sim$y,st_unidisc(sim$xa,5),wt)
#> [1] 0.3739816