list_counties: Return a data frame of county names & FIPS codes for a given state
Description
Return a data frame of county names & FIPS codes for a given state
Usage
list_counties(state)
Arguments
state
String representing the state you'd like to look up.
Accepts state names (spelled correctly), e.g. "Texas", or
postal codes, e.g. "TX". Can be lower-case.
Value
data frame of county name and FIPS code or NULL if invalid state