Make a US map with ggplot2

mUSMap takes in one dataframe that includes information about different US states. It merges this dataframe with a dataframe that includes geographical coordinate information. Depending on the arguments passed, it returns this data or a ggplot object constructed with the data.

mUSMap(
  data = NULL,
  key,
  fill = NULL,
  plot = c("borders", "frame", "none"),
  style = c("compact", "real")
)

Arguments

data

A dataframe with US states as cases

key

The column name in the data that holds the unique names of each state

fill

A variable in the data used to specify the fill color of states in the map (note: if fill is not null, then plot cannot be set to "none")

plot

The plot desired for the output. plot = "none" returns the merged data that is the result of merging the data and the dataframe with the geographical coordinate information; plot = "frame" returns an empty (unplottable) ggplot object; plot = "border" (the default) returns a ggplot object with one geom_polygon layer that shows the borders of the states

style

The style in which to display the map. compact gives a polyconic projection with Alaska and Hawaii on the lower left corner; real gives the real size and position of all states without any projection.

Examples

USArrests2 <- USArrests |> tibble::rownames_to_column("state")
mUSMap(USArrests2, key="state", fill = "UrbanPop") 
#> Mapping API still under development and may change in future releases.