SMMT (version 1.2.0)

mutation_count: Mutation count

Description

Count number of mutations in a given time period

Usage

mutation_count(
  mutations,
  start_date,
  end_date = Sys.Date(),
  territorial_changes_only = FALSE
)

Value

A list with 4 elements:

1. mapped: A tibble with the mapped municipalities

2. unmapped: A tibble with the unmapped municipalities

3. state_old: see above

4. state_new: see above

Arguments

mutations

A tibble containing the municipality mutations inventory (see import_CH_municipality_inventory)

start_date

Date vector (incl)

end_date

Date vector (excluded)

territorial_changes_only

boolean. FALSE if all mutations should be considered. TRUE if mutations that have an effect on the municipal territory only should be considered. FALSE includes name changes, Bezirk number changes etc.

Details

Approach

1. Download the Swiss municipality inventory

2. Import it into R workspace with import_CH_municipality_inventory

3. Set the old state and the new state (see example)

4. Get the mapping table with this function

Example Daettwil / Baden

On 1.1.1962 Daettwil (Bfs Nr. 4025) merged with Baden (Bfs Nr. 4021). Let's define

• old_state <- as.Date("1961-01-01")

• new_state <- as.Date("1963-01-01")

• Result:

  bfs_nr_new	name_new	bfs_nr_old	name_old	4021	Baden
  4021	Baden	4021	Baden	4025	Daettwil

Examples

mutations <- structure(list(hist_id = c(11227L, 11240L, 13189L),
district_hist_id = c(10025L, 10025L, 10025L),
kanton_abbr = c("AG", "AG", "AG"),
bfs_nr = c(4025L, 4021L, 4021L),
name = c("Daettwil", "Baden", "Baden"),
admission_nr = c(1000L, 1000L, 1004L),
admission_mode = c(20L, 20L, 26L),
admission_date = structure(c(-3653, -3653, -2922),
class = c("Date")),
abolition_nr = c(1004L, 1004L, NA),
abolition_mode = c(29L, 26L, NA),
abolition_date = structure(c(-2923, -2923, NA),
class = c("Date")),
change_date = structure(c(-2923, -2923, -2922), class = c("Date"))),
row.names = c(NA, -3L), class = c("tbl_df", "tbl", "data.frame"))

mapping_object <- map_old_to_new_state(mutations,
as.Date("1961-01-01"), as.Date("1963-01-01"))