Create strata data frame using get_strata_areas — create

Create strata data frame using get_strata_areas

Usage

create_strata(names = NA, depths_shallow, depths_deep, lats_south, lats_north)

Arguments

names: A vector of character values providing a name for each strata; if left at the default value of NA, then names will be created using capital letters starting with A for each NA value.
depths_shallow: vector of the shallow depths splits for each strata
depths_deep: vector of the deep depths splits for each strata
lats_south: vector of the southern latitude splits for each strata
lats_north: vector of the northern latitude splits for each strata

Value

Returns the data frame formatted for use by get_design_based and additional prediction functions in other downstream packages. The data frame will have six columns, (1) name, (2) area, (3) Depth_m.1, (4) Depth_m.2, (5) Latitude_dd.1, and (6) Latitude_dd.2.

Details

Create a data frame of strata formatted for use by models that need estimates of the area for each strata to expand estimates of abundance. Strata limits are provided by the user in terms of and east and west ranges using depth (shallow and deep, respectively) and north and south ranges using latitudes.

Author

Chantel Wetzel and Kelli Johnson

Examples

strata <- create_strata(
  names          = c("deep_south", "shallow_south", "deep_central_north", "shallow_central", "shallow_north"),
  depths_shallow = c(183, 55, 183, 55, 55),
  depths_deep    = c(549, 183, 549, 183, 183),
  lats_south     = c(32, 32, 40, 40, 44),
  lats_north     = c(40, 40, 49, 44, 49)
)

Create strata data frame using `get_strata_areas`