spatsoc

News | Installation | Usage | Contributing

spatsoc is an R package for detecting spatial and temporal groups in GPS relocations. It can be used to convert GPS relocations to gambit-of-the-group format to build proximity-based social networks with grouping and edge-list generating functions. In addition, the randomizations function provides data-stream randomization methods suitable for GPS data and the get_gbi function generates group by individual matrices useful for building networks with asnipe::get_network.

See below for installation and basic usage.

For more details, see the blog post and vignettes:

• Introduction to spatsoc
• Frequently asked questions
• Using spatsoc in social network analysis
• Using edge list and dyad id functions

News

New edge-list generating functions added:

• edge_nn
• edge_dist

and dyad id function:

• dyad_id

(feedback welcome as always!)

Both documented further in a new vignette: Using edge list and dyad id functions.

Also, our article describing spatsoc was just published at Methods in Ecology and Evolution. Link here and thanks to reviewers and editors at rOpenSci and at MEE.

More detailed news here.

Installation

Install the latest version with remotes.

remotes::install_github('ropensci/spatsoc')

# or CRAN
install.packages('spatsoc')

spatsoc depends on rgeos and requires GEOS installed on the system.

• Debian/Ubuntu: apt-get install libgeos-dev
• Arch: pacman -S geos
• Fedora: dnf install geos geos-devel
• Mac: brew install geos
• Windows: see here

Usage

Load package, import data

spatsoc expects a data.table for all of its functions. If you have a data.frame, you can use data.table::setDT() to convert it by reference. If your data is a text file (e.g.: CSV), you can use data.table::fread() to import it as a data.table.

library(spatsoc)
library(data.table)
DT <- fread(system.file("extdata", "DT.csv", package = "spatsoc"))
DT[, datetime := as.POSIXct(datetime, tz = 'UTC')]

Temporal grouping

group_times groups rows temporally using a threshold defined in units of minutes (B), hours (C) or days (D).

Spatial grouping

group_pts groups points spatially using a distance matrix (B) and a spatial threshold defined by the user (50m in this case). Combined with group_times, the returned ‘group’ column represents spatiotemporal, point based groups (D).

group_lines groups sequences of points (forming a line) spatially by buffering each line (A) by the user defined spatial threshold. Combined with group_times, the returned ‘group’ column represents spatiotemporal, line overlap based groups (B).

group_polys groups home ranges by spatial and proportional overlap. Combined with group_times, the returned ‘group’ column represents spatiotemporal, polygon overlap based groups.

Edge-list generating functions

edge_dist and edge_nn generate edge-lists. edge_dist measures the spatial distance between individuals (A) and returns all pairs within the user specified distance threshold (B). edge_nn measures the distance between individuals (C) and returns the nearest neighbour to each individual (D).

Social network analysis functions

randomizations for data-stream randomization and get_gbi for generating group by individual matrices.

Contributing

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.

Development of spatsoc welcomes contribution of feature requests, bug reports and suggested improvements through the issue board.

See details in CONTRIBUTING.md.