geography: Return or replace geography metadata of an acs object.

In acs: Download, Manipulate, and Present American Community Survey and Decennial Data from the US Census

Description

geography() will return the geography of an acs object, as a dataframe. Depending on the format of the data at import (and possibly the values of geocols=, if the object was created with read.acs), this may have multiple columns, but the number of geographic rows should be the same as the number of rows of the acs estimates and standard errors.

When used for assignment, geography<- will change the values contained in the metadata, replacing the existing dataframe with a new one. To replace a single value or a limited subset, call with subsetting (e.g., geography(object)[i,j]<-value or geography(object)[[i]]<-value; note that the brackets should occur outside the call – you are subsetting the dataframe, not the object).

To help with replacement operations, the package provides a new prompt method, which can be used to interactively set new values for geography (as well as other metadata); see prompt.acs.

Usage

geography(object)

geography(object)<-value

Arguments

object	an acs object
value	a dataframe containing geographic metadata; must contain the same number of rows as the object

Value

Returns (or replaces) a dataframe containing the geography slot of an object.

Author(s)

Ezra Haber Glenn [e-mail]

See Also

prompt.acs, a helper function to interactively generate a new geography dataframe to be used for replacement.

acs-class

Examples

data(lawrence10)
geography(lawrence10)
str(geography(lawrence10))

acs documentation built on May 1, 2019, 8:41 p.m.