get_density_map2: Creates a map with two gradients in the same scale.
In bclroger/euparliament: Analysis of the EU Parliament elections of 2014 and 2019

Description Usage Arguments Value Examples

This is a very similar function to get_density_map, but this one plots a similar map with two gradients in the same scale with a break set to the value zero and changes the default values of the arguments gradmin and gradmax.

This function creates a map based on the dataframe assigned to argument data that creates a map showing the values of the column assigned to the fill_by argument with two gradients in the same scale.

1	get_density_map2(data, fill_by, legend = "", title = "", gradmin = -32, gradmax = 42, gradnum = 4, colors = c("#a32424", "#FFFFFF", "#224d77"))

`data`	The `dataframe` with the polygon data and other data.
`fill_by`	The `column` that with the desired info to be shown in the map.
`legend`	The `string` to be used as legend of the map.
`title`	The `string` to be used as title of map.
`gradmin`	Lowest value shown in the gradient scale. Default: -32.
`gradmax`	Highest value shown in the gradient scale. Default: 42.
`gradnum`	Number of intervals shown in the gradient scale. Default: 4.
`colors`	The color gradient of "fill_by" info. Default: "#a32424",#FFFFFF","#224d77".

Plots a map with two gradients in the same scale with a break around zero. The map uses epsg: 3035 as a projection (Azimuthal equal area focused on the European Union) showing the values of the selected column from the selected dataframe.

Country <- c("Austria", "Belgium", "Bulgaria", "Croatia")
EPP <- c(7,22,31,-27)
SD <- c(41,-15,28,-30)
Other <- c(35,22,-10,-5)
IN <- c(-25,34,42,-14)
df.data <- data.frame(Country, EPP, SD, Other, IN)
library("rnaturalearth")
library("rnaturalearthdata")
library("ggplot2")
world <- ne_countries(scale = "medium", returnclass = "sf")

t_world <- merge(world, df.data, by.x="name_long", by.y="Country")

get_density_map2(t_world, t_world$SD, legend="Gains/Losses", title= "Seats Gained or Lost by SD")