Draw a map with labeled regions

Like map, but labels the regions.

Usage

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

Author

Tom Minka

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 tpminka@media.mit.edu).
...: 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.

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