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https://github.com/jeffreyevans/genetit

R package for spatial graph-theoretic gravity modelling
https://github.com/jeffreyevans/genetit

cran landscape-genetics r r-package r-spatial rstats spatial statistics

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R package for spatial graph-theoretic gravity modelling

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# GeNetIt (CRAN 0.1-6, development 0.1-7) 



[![CRAN

status](http://www.r-pkg.org/badges/version/GeNetIt)](https://cran.r-project.org/package=GeNetIt)

[![CRAN RStudio mirror

downloads](http://cranlogs.r-pkg.org/badges/grand-total/GeNetIt)](https://cran.r-project.org/package=GeNetIt)



GeNetIt is an R package for spatial graph-theoretic gravity modeling. The model framework is applicable for 

other types of matrix-based spatial flow (from-to) problems. Includes functions for constructing spatial graphs, 

sampling, summarizing associated raster variables and building unconstrained and singly constrained 

gravity models following Murphy et al., (2010). 



As of version 0.1-6 all support of raster (RasterLayer, RasterStack) and sp (SpatialPointsDataFrame) class objects  

has ended, replaced by terra (SpatRaster) and sf (sf POINT) classes.  



You can access a [full tutorial here](https://spatialr.s3.us-west-2.amazonaws.com/Gravity/GravityModel.html)



# Available functions in GeNetIt 0.1-6 are:



| `GeNetIt` Function           | Description                                                                             |

|:-----------------------------|:----------------------------------------------------------------------------------------|

| `adj.matrix`                 | Creates binary adjacency matrix of from-to (joins) structure of graph 

| `build.node.data`            | Build node data 

| `compare.models`             | Compare competing hypothesis (models)

| `dmatrix.df`                 | Distance matrix to data.frame

| `dps`                        | dps genetic distance matrix for Columbia spotted frog (Rana luteiventris)

| `flow`                       | Convert distance matrix to flow (1-d)

| `graph.metrics`              | Calculates a suite of metrics on the structure of the graph

| `graph.statistics`           | Raster statistics for edges (lines) with buffer argument for multi-scale assessment

| `gravity.es`                 | Effect size for a gravity model

| `gravity`                    | Gravity model

| `knn.graph`                  | K Nearest Neighbor or saturated Graph

| `node.statistics`            | Raster statistics for nodes (points)

| `plot.gravity`               | plot generic for a gravity model object

| `predict.gravity`            | predict generic gravity model

| `print.gravity`              | print generic gravity model

| `ralu.model`                 | Columbia spotted frog (Rana luteiventris) data for specifying gravity model. Note, the data.frame is already log transformed.

| `ralu.site`                  | Subset of site-level spatial point data for Columbia spotted frog (Rana luteiventris)

| `rasters`                    | Subset of raster data for Columbia spotted frog (Rana luteiventris)

| `summary.gravity`            | summary generic for gravity model objects

| `area.graph.statistics`      | Depreciated, please use graph.statistics with buffer argument

		

**Bugs**: Users are encouraged to report bugs here. Go to [issues](https://github.com/jeffreyevans/GeNetIt/issues) in the menu above, and press new issue to start a new bug report, documentation correction or feature request. You can direct questions to .



**To install `GeNetIt` in R use install.packages() to download curent stable release from CRAN** 



**or, for the development version, run the following (requires the remotes package):**

`remotes::install_github("jeffreyevans/GeNetIt")`