CreateStrataDF.fn: Create strata data frame using 'StrataAreas.fn'

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

Create strata data frame using StrataAreas.fn

Description

Create strata data frame using StrataAreas.fn

Usage

CreateStrataDF.fn(
  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

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.

Value

Returns the data frame formatted for use by Biomass.fn 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.

Author(s)

Chantel Wetzel and Kelli Johnson

See Also

See StrataAreas.fn for how areas are calculated. See Biomass.fn for how the areas are used to create design-based biomass estimates.

Examples

strata <- CreateStrataDF.fn(
  names          = c("deep_s", "shallow_s", "deep_mn", "shallow_m", "shallow_n"),
  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)
)
# Which returns a data frame that looks like the following:
#      name      area Depth_m.1 Depth_m.2 Latitude_dd.1 Latitude_dd.2
#    deep_s 16468.110       183       549            32            40
# shallow_s 16109.711        55       183            32            40
#   deep_mn 12478.575       183       549            40            49
# shallow_m  7042.491        55       183            40            44
# shallow_n 16390.383        55       183            44            49

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