county_choropleth_acs | R Documentation |
Creates a US County choropleth using the US Census' American Community Survey (ACS) data. Requires the acs package to be installed, and a Census API Key to be set with the acs's api.key.install function. Census API keys can be obtained at http://www.census.gov/developers/tos/key_request.html.
county_choropleth_acs(
tableId,
endyear = 2011,
span = 5,
num_colors = 7,
state_zoom = NULL,
county_zoom = NULL
)
tableId |
The id of an ACS table |
endyear |
The end year of the survey to use. See acs.fetch (?acs.fetch) and http://1.usa.gov/1geFSSj for details. |
span |
The span of time to use. See acs.fetch and http://1.usa.gov/1geFSSj for details. |
num_colors |
The number of colors on the map. A value of 1 will use a continuous scale. A value in [2, 9] will use that many colors. |
state_zoom |
An optional vector of states to zoom in on. Elements of this vector must exactly match the names of states as they appear in the "region" column of ?state.regions. |
county_zoom |
An optional vector of counties to zoom in on. Elements of this vector must exactly match the names of counties as they appear in the "region" column of ?county.regions. |
A choropleth.
Uses the acs package created by Ezra Haber Glenn.
api.key.install
in the acs package which sets an Census API key for the acs library
http://factfinder2.census.gov/faces/help/jsf/pages/metadata.xhtml?lang=en&type=survey&id=survey.en.ACS_ACS which contains a list of all ACS surveys.
## Not run:
# median income, all counties in US
county_choropleth_acs("B19301")
# continuous scale, zooing in on all counties in New York, New Jersey and Connecticut
county_choropleth_acs("B19301", num_colors=1, state_zoom=c("new york", "new jersey", "connecticut"))
# zooming in on the 5 counties (boroughs) that make up New York City
library(dplyr)
library(choroplethrMaps)
data(county.regions)
nyc_county_names=c("kings", "bronx", "new york", "queens", "richmond")
nyc_county_fips = county.regions %>%
filter(state.name=="new york" & county.name %in% nyc_county_names) %>%
select(region)
county_choropleth_acs("B19301", num_colors=1, county_zoom=nyc_county_fips$region)
## End(Not run)
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