choroplethr_acs: Create a choropleth from ACS data.

In trulia/choroplethr: Simplify the Creation of Choropleth Maps in R

Description

Creates a 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.

Usage

choroplethr_acs(tableId, map, endyear = 2011, span = 5, buckets = 7,
  zoom = NULL)

Arguments

tableId	The id of an ACS table
map	A string indicating which map the data is for. Must be "state", "county" or "zip".
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. on the same longitude and latitude map to scale. This variable is only checked when the "states" variable is equal to all 50 states.
buckets	The number of equally sized buckets to places the values in. A value of 1 will use a continuous scale, and a value in [2, 9] will use that many buckets.
zoom	An optional list of states to zoom in on. Must come from the "name" column in ?state.regions.

Value

A choropleth.

References

Uses the acs package created by Ezra Haber Glenn.

See Also

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.

Examples

## Not run: 
# population of all states, 9 equally sized buckets
choroplethr_acs("B01003", "state")

# median income, continuous scale, counties in New York, New Jersey and Connecticut
choroplethr_acs("B19301", "county", buckets=1, zoom=c("new york", "new jersey", "connecticut"))

# median income, all zip codes
choroplethr_acs("B19301", "zip") 
## End(Not run)

trulia/choroplethr documentation built on June 1, 2019, 1:52 a.m.