mapa {Relectoral}

Graphs. Representation on maps. Choropleth map

Description

With this function you can make choropleth maps, to carry out representations of the data on a map. By default, the map used is that of Spain, but any map of another country could be used too, as long as it is of shapefile type. NOTE: The shapefile to be used can be downloaded from the following web page https://github.com/Miguelro/Electoral/tree/master/Mapa and all the files will be placed in a folder, which will serve to point out the path to be indicated in the 'camino' parameter.

Usage

mapa(
  dat,
  camino,
  titulo,
  size_letra = 3,
  color_text = "brown",
  ver_text = TRUE
)

Arguments

dat

It's a data.frame with two columns. The first contains, in the case of Spain, the INE (Spanish National Institute of Statistics) code of the provinces, and the second the value of the variable to be represented. IMPORTANT NOTE: It must be taken special care with the fact that the first column is not of the factor type. It is recommended to be character type, never use a factor.

camino

It will be a character value to indicate where are located the files downloaded from github containing the map data. The path must end with the character "/".

titulo

The title to be displayed on the map will be specified here.

size_letra

This is the font size that will be used to display the numerical values on the map.

color_text

It serves to indicate the color of the text that will be used to display the data on the map.

ver_text

It must be a Boolean value. By default it is TRUE, to indicate that the data will be shown on the map. On the other hand, if this parameter is set to FALSE the data values will not be displayed.

Value

Returns a ggplot2 object, containing the map to be represented

Examples

d <-data.frame(
cod=c(1,2,5,9,15,23,43,50),
da = c(3,5,7,10,1,3,80,4)
)
suppressWarnings(mapa(d,system.file("maps/", package="Relectoral"),
                     titulo="An example map and some NA values",ver_text = TRUE))