fortify.map {ggplot2}R Documentation

Fortify a map

Description

Fortify method for map objects

Usage

fortify.map(model, data, ...)

Arguments

model map object
data ignored
... ignored

Details

This function turns a map into a data frame than can more easily be plotted with ggplot2.

Author(s)

Hadley Wickham <h.wickham@gmail.com>

Examples

if (require(maps)) {
ca <- map_data("county", "ca")
qplot(long, lat, data = ca, geom="polygon", group = group)
tx <- map_data("county", "texas")
qplot(long, lat, data = tx, geom="polygon", group = group, 
colour = I("white"))
}

[Package ggplot2 version 0.8.2 Index]