number_of_total_units {prioritizr}

Number of total units

Description

Extract the number of total units in an object.

Usage

number_of_total_units(x, ...)

## S3 method for class 'ConservationProblem'
number_of_total_units(x, ...)

Arguments

x

problem() object.

...

not used.

Details

The total units for an object corresponds to the total number of entries (e.g., rows, cells) for the planning unit data. For example, a single-layer raster dataset might have 90 cells and only two of these cells contain non-missing (NA) values. As such, this dataset would have 90 total units and two planning units.

Value

An integer number of total units.

Examples

## Not run: 
# load data
sim_pu_raster <- get_sim_pu_raster()
sim_features <- get_sim_features()
sim_zones_pu_raster <- get_sim_zones_pu_raster()
sim_zones_features <- get_sim_zones_features()

# create problem with one zone
p1 <-
  problem(sim_pu_raster, sim_features) %>%
  add_min_set_objective() %>%
  add_relative_targets(0.2) %>%
  add_binary_decisions()

# print number of planning units
print(number_of_planning_units(p1))

# print number of total units
print(number_of_total_units(p1))

# create problem with multiple zones
p2 <-
  problem(sim_zones_pu_raster, sim_zones_features) %>%
  add_min_set_objective() %>%
  add_relative_targets(matrix(0.2, ncol = 3, nrow = 5)) %>%
  add_binary_decisions()

# print number of planning units
print(number_of_planning_units(p2))

# print number of total units
print(number_of_total_units(p2))

## End(Not run)