strat_prep: Prepare survey data for calculating stratified mean
In andybeet/survdat: Tools for working with NEFSC survey data

strat_prep

R Documentation

Prepare survey data for calculating stratified mean

Description

Calculates the number of tows per strata and strata weight. Run before sub setting the data by species of interest to ensure all stations are accounted.

Usage

strat_prep(
  surveyData,
  areaPolygon = "NEFSC strata",
  areaDescription = "STRATA",
  filterByArea = "all",
  filterBySeason = "all"
)

Arguments

`surveyData`	Data table. NEFSC survey data generated by `get_survdat_data.R`
`areaPolygon`	sf object or character string. Default = "NEFSC strata". The default option uses the survey strata shapefile bundled with the package. To use any other shapefile for stratification, the shapefile must be read in as an sf object and the `areaDescription` argument must be specified.
`areaDescription`	Character String. Column name from `areaPolygon` that contains the strata designations.
`filterByArea`	Numeric vector. Set of areas to subset from the `areaDescription` of the `areaPolygon`.
`filterBySeason`	Character string. Which seasons of the `surveyData` should be included. Choices include "SPRING", "FALL", or "all".