area_table: A data.table to manage areas in a farm

In fmsan51/blvibmjp: Individual Based Model of Bovine Leukemia Virus Spread in a Dairy Herd in Japan

Description

area_table is a data.table to manage areas (barns, paddocks, hatches, etc.) in a farm. Users must specify one area_table consisted of following items before starting a simulation.

Usage

a_area

area_table_cols

Format

An object of class data.table (inherits from data.frame) with 1 rows and 3 columns.

An object of class character of length 3.

Details

• area_id (integer): Area ID.

• area_type ("free"/"tie"/"outside"/"hatch"/"pasture"): Type of a area. Specify one of "free" (hatch, freebarn, free-stall, etc.), "tie" (tie-stall), "outside" (paddock or rangeland, etc.), "hatch" or "pasture" (yotaku).

• capacity (list consisted of numeric): Max number of cows to be kept in the area. Inf is set if you specify NA. capacity must be set if area_type is "tie"; otherwise optional.

  • If area_type is "free" or "outside": a numeric or NA.

  • If area_type is "tie": a numeric vector whose length is equal to the number of lanes in the area and each elements indicates the number of chambers in a lane.

  • If area_type is "hatch": only NA is allowed.

Note

Several parameters are calculated by setup_area_table and added to a area_table as attribute variables. Such values are intenended to be touched only by simulation functions and not by users.

• capacity: Max number of cows can be kept in a area.

• tie_stall: area_ids of tie-stall areas.

See Also

cow_table tie_stall_table movement_table rp_table

fmsan51/blvibmjp documentation built on Sept. 2, 2020, 9:04 p.m.