gdverse (version 1.3-3)

psd_iev: PSD of an interaction of explanatory variables (PSD-IEV)

Description

PSD of an interaction of explanatory variables (PSD-IEV)

Usage

psd_iev(discdata, spzone, wt)

Value

The Value of PSD-IEV

Arguments

discdata

Observed data with discrete explanatory variables. A tibble or data.frame .

spzone

Fuzzy overlay spatial zones. Returned from st_fuzzyoverlay().

wt

Spatial weight matrix

Author

Wenbo Lv

Details

\(\phi = 1 - \frac{\sum_{i=1}^m \sum_{k=1}^{n_i}N_{i,k}\tau_{i,k}}{\sum_{i=1}^m N_i \tau_i}\)

References

Yongze Song & Peng Wu (2021) An interactive detector for spatial associations, International Journal of Geographical Information Science, 35:8, 1676-1701, DOI:10.1080/13658816.2021.1882680

Examples

data('sim')
wt = sdsfun::inverse_distance_swm(sf::st_as_sf(sim,coords = c('lo','la')))
sim1 = dplyr::mutate(sim,dplyr::across(xa:xc,\(.x) sdsfun::discretize_vector(.x,5)))
sz = sdsfun::fuzzyoverlay(y ~ xa + xb + xc, data = sim1)
psd_iev(dplyr::select(sim1,xa:xc),sz,wt)