README.Rmd

---
output: github_document
---

<!-- README.md is generated from README.Rmd. Please edit that file -->

```{r, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "##",
  fig.path = "man/figures/README-",
  out.width = "100%",
  warning = FALSE,
  message = FALSE
)
```

# gdverse <a href="https://stscl.github.io/gdverse/"><img src="man/figures/logo.png" align="right" height="139" alt="gdverse website" /></a>

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**Analysis of Spatial Stratified Heterogeneity**

## Overview

Current models and functions provided by **gdverse** are:

| *Model* | *Function* | *Support* |
|---------------------|--------------------|------------------|
|[GD](https://doi.org/10.1080/13658810802443457)|`gd()`| ✔️ |
|[OPGD](https://doi.org/10.1080/15481603.2020.1760434)|`opgd()`| ✔️ |
|[GOZH](https://doi.org/10.1016/j.isprsjprs.2022.01.009)|`gozh()`| ✔️ |
|[LESH](https://doi.org/10.1080/17538947.2023.2271883)|`lesh()`| ✔️ |
|[SPADE](https://doi.org/10.1080/13658816.2018.1476693)|`spade()`| ✔️ |
|[IDSA](https://doi.org/10.1080/13658816.2021.1882680)|`idsa()`| ✔️ |
|[RGD](https://doi.org/10.1016/j.jag.2022.102782)|`rgd()`| ✔️ |
|[RID](https://doi.org/10.1016/j.spasta.2024.100814)|`rid()`| ✔️ |
|[SRSGD](https://doi.org/10.1016/j.ins.2021.12.019)|`srsgd()`| ✔️ |

## Installation

- Install from [CRAN](https://CRAN.R-project.org/package=gdverse) with:

``` r
install.packages("gdverse", dep = TRUE)
```

- Install development binary version from [R-universe](https://stscl.r-universe.dev/gdverse) with:

``` r
install.packages('gdverse',
                 repos = c("https://stscl.r-universe.dev",
                           "https://cloud.r-project.org"),
                 dep = TRUE)
```

- Install development source version from [GitHub](https://github.com/stscl/gdverse) with:

``` r
# 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>.

## Example

```{r example_gdverse}
library(gdverse)
data("ndvi")
ndvi
```

### OPGD model

```{r}
discvar = names(ndvi)[-1:-3]
discvar
ndvi_opgd = opgd(NDVIchange ~ ., data = ndvi, 
                 discvar = discvar, cores = 6)
ndvi_opgd
```

### GOZH model

```{r}
g = gozh(NDVIchange ~ ., data = ndvi)
g
```