This data set records the population and the three most frequently reported ancestries by US county, according to the 2000 census.
data(ancestry)
A data frame with 3219 observations on the following 5 variables.
county
A factor. An attempt has been made to make the
levels look similar to the county names used in the maps
package.
population
a numeric vector
top
a character vector
second
a character vector
third
a character vector
mapplot
, for examples.