Analysis of Spatial Stratified Heterogeneity
Current models and functions provided by gdverse are:
| Model | Function | Support |
|---|---|---|
| GD | gd() |
✔️ |
| OPGD | opgd() |
✔️ |
| GOZH | gozh() |
✔️ |
| LESH | lesh() |
✔️ |
| SPADE | spade() |
✔️ |
| IDSA | idsa() |
✔️ |
| RGD | rgd() |
✔️ |
| RID | rid() |
✔️ |
| SRSGD | srsgd() |
✔️ |
- Install from CRAN with:
install.packages("gdverse", dep = TRUE)- Install development binary version from R-universe with:
install.packages('gdverse',
repos = c("https://stscl.r-universe.dev",
"https://cloud.r-project.org"),
dep = TRUE)- Install development source version from GitHub with:
# install.packages("devtools")
devtools::install_github("stscl/gdverse",
build_vignettes = TRUE,
dep = TRUE)✨ Please ensure that Rcpp is properly installed and the appropriate C++ compilation environment is configured in advance if you want to install gdverse from github.
✨ The gdverse package supports the use of robust discretization for the robust geographical detector and robust interaction detector. For details on using them, please refer to https://stscl.github.io/gdverse/articles/rgdrid.html.
library(gdverse)
data("ndvi")
ndvi
## # A tibble: 713 × 7
## NDVIchange Climatezone Mining Tempchange Precipitation GDP Popdensity
## <dbl> <chr> <fct> <dbl> <dbl> <dbl> <dbl>
## 1 0.116 Bwk low 0.256 237. 12.6 1.45
## 2 0.0178 Bwk low 0.273 214. 2.69 0.801
## 3 0.138 Bsk low 0.302 449. 20.1 11.5
## 4 0.00439 Bwk low 0.383 213. 0 0.0462
## 5 0.00316 Bwk low 0.357 205. 0 0.0748
## 6 0.00838 Bwk low 0.338 201. 0 0.549
## 7 0.0335 Bwk low 0.296 210. 11.9 1.63
## 8 0.0387 Bwk low 0.230 236. 30.2 4.99
## 9 0.0882 Bsk low 0.214 342. 241 20.0
## 10 0.0690 Bsk low 0.245 379. 42.0 7.50
## # ℹ 703 more rowsdiscvar = names(ndvi)[-1:-3]
discvar
## [1] "Tempchange" "Precipitation" "GDP" "Popdensity"
ndvi_opgd = opgd(NDVIchange ~ ., data = ndvi,
discvar = discvar, cores = 6)
ndvi_opgd
## *** Optimal Parameters-based Geographical Detector
## Factor Detector
##
## | variable | Q-statistic | P-value |
## |:-------------:|:-----------:|:--------:|
## | Precipitation | 0.8693505 | 2.58e-10 |
## | Climatezone | 0.8218335 | 7.34e-10 |
## | Tempchange | 0.3330256 | 1.89e-10 |
## | Popdensity | 0.1990773 | 6.60e-11 |
## | Mining | 0.1411154 | 6.73e-10 |
## | GDP | 0.1004568 | 3.07e-10 |g = gozh(NDVIchange ~ ., data = ndvi)
g
## *** Geographically Optimal Zones-based Heterogeneity Model
## Factor Detector
##
## | variable | Q-statistic | P-value |
## |:-------------:|:-----------:|:--------:|
## | Precipitation | 0.87255056 | 4.52e-10 |
## | Climatezone | 0.82129550 | 2.50e-10 |
## | Tempchange | 0.33324945 | 1.12e-10 |
## | Popdensity | 0.22321863 | 3.00e-10 |
## | Mining | 0.13982859 | 6.00e-11 |
## | GDP | 0.09170153 | 3.96e-10 |