Calculate region-level age composition and mean/std.dev length at age

Usage

calc_agecomp_region(racebase_tables, age_comps_stratum)

racebase_tables: data object created from `gapindex::get_data()``
age_comps_stratum: a named list of stratum age comps and numbers by survey/year/stratum/sex/length, a result object from gapindex::calc_agecomp_stratum().

dataframe of age composition and mean/standard deviation of length at age aggregated across regions.

Field	Description
YEAR	Year the survey was conducted in.
AGE	Age bin of a taxon in years estimated by the age comp estimate.
AREA_ID	Area ID code for each statistical area used to produce production estimates (e.g., biomass, population, age comps, length comps). Each area ID is unique within each survey.
LENGTH_MM_MEAN	Mean length estimated in age comp estimate.
LENGTH_MM_SD	Variance of mean length estimated in age comp estimate.
POPULATION_COUNT	The estimated population caught in the survey for a species, group, or total for a given survey.
SEX	Sex of a specimen where "1" = "Male", "2" = "Female", "3" = Unsexed.
SPECIES_CODE	The species code of the organism associated with the 'common_name' and 'scientific_name' columns. For a complete species list, review the code books.
SURVEY	Name and description of survey. The column 'survey' is associated with the 'srvy' and 'survey_id' columns.
SURVEY_DEFINITION_ID	This number uniquely identifies a survey. Name and description of survey. The column 'survey_id' is associated with the 'srvy' and 'survey' columns. For a complete list of surveys, review the code books.