map.text: Draw a map with labeled regions

In maps: Draw Geographical Maps

Draw a map with labeled regions

Description

Like map, but labels the regions.

Usage

map.text(database, regions = ".", exact = FALSE, labels, cex = 0.75,
add = FALSE, move = FALSE, ...)

Arguments

database	character string naming a geographical database, or a list of x, y, and names obtained from a previous call to map.
regions	character vector that names the polygons to draw.
exact	If 'TRUE', only exact matches with 'regions' are selected for drawing.
labels	character vector of labels, one for each region selected. Defaults to the names in the database.
cex	character expansion factor.
add	If FALSE, a map is drawn, then labels placed on top. If TRUE, labels are added to the existing map.
move	If TRUE, labels are moved so that they don't overlap. Requires the mining library (not in CRAN, contact [e-mail]).
...	Other arguments are the same as in map.

Value

If add = FALSE, a map is drawn by calling map. Then the label for each region is placed at the centroid of the region polygon.

The return value is a map object, as from map.

Author(s)

Tom Minka

Examples

map.text("world", "ira")    # iran and iraq
map.text("state", "penn")
map.text("county", "penn")  # Pennsylvania counties
map.text("county", "new jersey")  # New Jersey counties

maps documentation built on May 29, 2024, 9:04 a.m.