CheckStrata.fn: Calculate the number of observations by year and strata

In nwfsc-assess/nwfscSurvey: Northwest Fisheries Science Center Survey

Calculate the number of observations by year and strata

Description

Calculate the number of observations by year and strata

Usage

CheckStrata.fn(
  dir = NULL,
  dat,
  strat.vars = c("Depth_m", "Latitude_dd"),
  strat.df,
  printfolder = "forSS3",
  verbose = TRUE
)

Arguments

dir	Directory where output will be saved. The directory where the file should be saved. If dir = NULL no output will be saved.
dat	Data-frame of the catch data that has been created by pull_catch().
strat.vars	Variables in both data frame that are used to define the stratas. Default is bottom depth (m) and latitudes (decimal degrees), i.e., c("Depth_m", "Latitude_dd").
strat.df	A data frame that defines the strata and provides the calculated areas for each strata returned from createStrataDF.fn().
printfolder	A string that will be appended to dir, creating a folder where the output will be saved. If specified as "", the output will just be saved directly in dir. The default is "forSS3".
verbose	A logical that specifies if you want to print messages and warnings to the console. The default is TRUE.

Details

Calculates and returns the total number of tows and positive tows conducted in each strata by year. The selected stratas are used to expand the length and marginal age compositions and to calculate a design based index using the Biomass.fn().

Value

A matrix with the number of tows within each strata by year and the number of positive tows by strata and year.

Author(s)

Chantel Wetzel

nwfsc-assess/nwfscSurvey documentation built on Nov. 12, 2024, 8:14 p.m.