Create strata data frame using StrataAreas.fn
CreateStrataDF.fn.Rd
Create strata data frame using StrataAreas.fn
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 withA
for eachNA
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 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.
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.
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