solve: Solve a problem

In prioritizr/prioritizrutils: Utilities for prioritizr

Description

Solve a ConservationProblem-class or an OptimizationProblem-class.

Arguments

a	ConservationProblem-class or an OptimizationProblem-class object.
b	Solver-class object. Not used if a is an ConservationProblem-class object.
...	arguments passed to compile.

Details

If a OptimizationProblem-class is supplied, then the solution is returned as a logical showing the status of each planning unit. If a ConservationProblem-class is supplied, then the solution is returned in the format of the cost data contained inside it:

• RasterLayer-classthe solution is returned as a RasterLayer-class object. Cell values denote the decision.

• Spatial-classthe solution is returned as a SpatialPolygonsDataFrame or SpatialLinesDataFrame with a "Solution" column containing the decision values.

Value

A RasterLayer-class, Spatial-class, or a numeric vector containing the solution depending on the argument to a.

Examples

# build minimal conservation problem
p <- problem(sim_pu_raster, sim_features) %>%
  add_min_set_objective() %>%
  add_relative_targets(0.1) %>%
  add_binary_decision()


# solve the problem
s <- solve(p)

# print the solution
print(s)

# plot solution
plot(s, main="solution")

prioritizr/prioritizrutils documentation built on May 25, 2019, 12:20 p.m.