Function expand expands a data frame from animals as observations to animal-years as obserations — expand • kwdemog

Function expand expands a data frame from animals as observations to animal-years as obserations

expand(
  filename,
  start_year = 1976,
  current_year = NULL,
  fem_age_mat = 10,
  fem_age_senesc = 43,
  ages2stages = NULL
)

Arguments

filename: A file location (csv file) with births and deaths of each animal
start_year: Starting year for the expanded data, starts at 1976
current_year: End year for the expanded data, defaults to current calendar year
fem_age_mat: Female age at maturity, 10 years of age by default
fem_age_senesc: Female age at reproductive senescence, defaults to 43
ages2stages: A data frame of mapping ages and sexes to stages

Examples

if (FALSE) {
library(kwdemog)
data(orca)
data(ages2stages)
expanded_data = expand(orca, ages2stages = ages2stages)
# or use a filename
expanded_data = expand("use_this_file.csv", start_year = 1979, current_year = 2018,
fem_age_mat = 10, fem_age_senesc = 43, ages2stages = ages2stages)
}