R: Modal ancestry by County according to US 2000 Census
Modal ancestry by County according to US 2000 Census
Description
This data set records the population and the three most frequently
reported ancestries by US county, according to the 2000 census.
Usage
data(ancestry)
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.
Results
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