Description

This data set records the population and the three most frequently reported ancestries by US county, according to the 2000 census.

Usage

Format

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

Source

U.S. Census Bureau. The ancestry data were extracted from Summary File 3, available from

http://www.census.gov/census2000/sumfile3.html

which is based on the ‘long form’ questionnaire (asked to 1 in 6 households surveyed).

References

http://www.census.gov/prod/cen2000/doc/sf3.pdf

See Also

mapplot, for examples.