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Calculate cohort and production system distribution.

Source: R/livestock_cohorts.R
calculate_cohorts_systems.Rd

Distributes national herd totals across GLEAM-defined cohorts and production systems using gleam_livestock_categories and regional weight data.

Usage

calculate_cohorts_systems(data, system_shares = NULL)

Arguments

data

Dataframe with species, heads, and optionally iso3 or region.

system_shares

Optional dataframe with species, system, share columns. If NULL, uses GLEAM defaults.

Value

Dataframe expanded to cohort level with cohort, system, cohort_heads, and cohort_fraction columns.

Examples

tibble::tibble(
  species = "Cattle", heads = 10000,
  iso3 = "DEU"
) |>
  calculate_cohorts_systems()
#> # A tibble: 11 × 8
#>    species heads iso3  species_gen system cohort    cohort_fraction cohort_heads
#>    <chr>   <dbl> <chr> <chr>       <chr>  <chr>               <dbl>        <dbl>
#>  1 Cattle  10000 DEU   Cattle      Dairy  Adult Fe…            0.05          500
#>  2 Cattle  10000 DEU   Cattle      Dairy  Adult Ma…            0.05          500
#>  3 Cattle  10000 DEU   Cattle      Dairy  Replacem…            0.05          500
#>  4 Cattle  10000 DEU   Cattle      Dairy  Replacem…            0.05          500
#>  5 Cattle  10000 DEU   Cattle      Dairy  Surplus …            0.05          500
#>  6 Cattle  10000 DEU   Cattle      Dairy  Surplus …            0.05          500
#>  7 Cattle  10000 DEU   Cattle      Beef   Adult Fe…            0.14         1400
#>  8 Cattle  10000 DEU   Cattle      Beef   Adult Ma…            0.14         1400
#>  9 Cattle  10000 DEU   Cattle      Beef   Replacem…            0.14         1400
#> 10 Cattle  10000 DEU   Cattle      Beef   Replacem…            0.14         1400
#> 11 Cattle  10000 DEU   Cattle      Beef   Fattening            0.14         1400