peacesciencer (version 1.1.0)

add_minimum_distance: Add minimum distance data to your data frame

Description

add_minimum_distance() allows you to add the minimum distance (in kilometers) to a (dyad-year, leader-year, leader-dyad-year, state-year) data frame. These estimates are recorded in the cow_mindist and gw_mindist data that come with this package. The data are current as of the end of 2019.

Usage

add_minimum_distance(data)

Value

add_minimum_distance() takes a (dyad-year, leader-year, leader-dyad-year, state-year) data frame and adds the minimum distance between the first state and the second state (in dyad-year data) or the minimum minimum (sic) distance for a given state in a given year.

Arguments

data

a data frame with appropriate peacesciencer attributes

Author

Steven V. Miller

Details

The function leans on attributes of the data that are provided by one of the "create" functions in this package (e.g. create_dyadyear() or create_stateyear()).

References

Schvitz, Guy, Luc Girardin, Seraina Ruegger, Nils B. Weidmann, Lars-Erik Cederman, and Kristian Skrede Gleditsch. 2022. "Mapping The International System, 1886-2017: The CShapes 2.0 Dataset." Journal of Conflict Resolution. 66(1): 144-161.

Weidmann, Nils B. and Kristian Skrede Gleditsch. 2010. "Mapping and Measuring Country Shapes: The cshapes Package." The R Journal 2(1): 18-24.

Examples

# \donttest{
# just call `library(tidyverse)` at the top of the your script
library(magrittr)
cow_ddy %>% add_minimum_distance()

create_dyadyears(system = "gw") %>% add_minimum_distance()

create_stateyears(system ="gw") %>% add_minimum_distance()
# }