Subset Data by Geographic Area

Filters prepared datasets to a specific geographic subset (state, region, or custom list of geographic IDs).

Usage

subset_by_geography(
  data,
  id_col = "GEOID10",
  state_fips = NULL,
  geoid_list = NULL,
  geoid_pattern = NULL
)

Arguments

data

A data.table or data frame to subset.

id_col

Character. Column name for geographic IDs. Default is "GEOID10".

state_fips

Optional character vector. Two-digit state FIPS codes to include. Data will be filtered to counties within these states.

geoid_list

Optional character vector. Specific geographic IDs to include.

geoid_pattern

Optional character. Regular expression pattern to match geographic IDs.

Value

A subset of the input data matching the specified criteria.

Examples

if (FALSE) { # \dontrun{
# Subset to California counties (state FIPS = "06")
ca_data <- subset_by_geography(
  data = prob_data,
  state_fips = "06"
)

# Subset to specific counties
selected <- subset_by_geography(
  data = prob_data,
  geoid_list = c("06001", "06003", "06005")
)
} # }