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Plot selected actions in space

Source: R/plot.R
plot_spatial_actions.Rd

Plot the spatial distribution of selected actions from a solutionset-class object returned by solve.

This function maps the selected planning unit–action pairs returned by get_actions onto the planning-unit geometry stored in the associated Problem object.

Usage

plot_spatial_actions(
  x,
  solutions = NULL,
  actions = NULL,
  layout = NULL,
  max_facets = 4L,
  nrow = NULL,
  ncol = NULL,
  ...,
  base_alpha = 0.08,
  selected_alpha = 0.95,
  base_fill = "grey95",
  base_color = NA,
  selected_color = NA,
  draw_borders = FALSE,
  show_base = TRUE,
  fill_values = NULL,
  fill_na = "grey80",
  use_viridis = TRUE
)

Arguments

x

A solutionset-class object returned by solve.

solutions

Optional integer vector of solution ids. If NULL, the first available solution is plotted by default.

actions

Optional action subset to display. Entries may match action ids or action-set labels.

layout

Character string controlling the layout. Must be one of "single" or "facet". If NULL, the default is "single".

max_facets

Maximum number of action facets shown when actions is NULL and faceting would otherwise create many panels.

nrow, ncol

Optional numbers of rows and columns used to arrange facets.

...

Reserved for future extensions.

base_alpha

Numeric value in \([0,1]\) giving the alpha of the base planning-unit layer.

selected_alpha

Numeric value in \([0,1]\) giving the alpha of the highlighted action layer.

base_fill

Fill colour for the base planning-unit layer.

base_color

Border colour for the base planning-unit layer.

selected_color

Border colour for highlighted layers.

draw_borders

Logical. If FALSE, borders are not drawn.

show_base

Logical. If TRUE, draw the base planning-unit layer underneath the highlighted output.

fill_values

Optional named vector of colours for discrete action maps.

fill_na

Fill colour for missing values.

use_viridis

Logical. If TRUE and the viridis package is available, use viridis discrete scales.

Value

Invisibly returns a ggplot object.

Details

Let \(x_{ia} \in \{0,1\}\) denote whether action \(a\) is selected in planning unit \(i\). This function plots the selected (pu, action) pairs in geographic space.

If layout = "facet" and only one run is plotted, one panel is drawn per action.

If layout = "single", all selected actions are drawn in a single map using discrete fills. If more than one action is selected in the same planning unit, the action labels are collapsed using "+".

When plotting multiple runs, only layout = "single" is supported.

Planning-unit geometry must be available in the associated problem object.

See also

get_actions, plot_spatial_planning_units, plot_spatial_features

Examples

if (
  requireNamespace("sf", quietly = TRUE) &&
  requireNamespace("ggplot2", quietly = TRUE) &&
  requireNamespace("rcbc", quietly = TRUE)
) {
  # Load a complete simulated planning problem.
  example_data <- load_sim_multiaction()

  problem <- create_problem(
    pu = example_data$planning_units,
    features = example_data$features,
    dist_features = example_data$dist_features,
    cost = "cost"
  ) |>
    add_actions(
      example_data$actions,
      cost = example_data$action_costs
    ) |>
    add_effects(
      example_data$effects,
      effect_type = "delta"
    ) |>
    add_constraint_targets_relative(0.05) |>
    add_objective_min_cost(alias = "cost", include_pu_cost = FALSE) |>
    add_objective_max_benefit(alias = "benefit") |>
    set_method_weighted_sum(
      aliases = c("cost", "benefit"),
      runs = set_runs_grid(n = 3),
      normalize_weights = TRUE
    ) |>
    set_solver_cbc(verbose = FALSE)

  solutions <- solve(problem)

  plot_spatial_actions(
    solutions,
    layout = "single"
  )
}