Parallel Coordinates Plot

Parallel coordinates plot of a set of selected configurations. Each line in the plot represents a configuration. By default, the final elite configurations are shown. To visualize configurations of other iterations these must be provided setting the argument iterations, configurations of different iterations are shown in different colors. Setting the only_elites argument to FALSE displays all configurations in the selected iterations, specific configurations can be selected providing their ids in the id_configuration argument.

parallel_coord(
  irace_results,
  id_configurations = NULL,
  param_names = NULL,
  iterations = NULL,
  only_elite = TRUE,
  by_n_param = NULL,
  color_by_instances = TRUE,
  filename = NULL
)

Arguments

irace_results

The data generated when loading the .Rdata file created by irace (or the filename of that file).

id_configurations

Configuration ids to be included in the plot. Example: c(20,50,100,300,500,600,700)

param_names

(character()) Parameters to be included in the plot. Example: c("algorithm","alpha","rho","q0","rasrank").

iterations

Numeric vector, iteration number that should be included in the plot (example: iterations = c(1,4,5))

only_elite

logical (default TRUE), only print elite configurations (argument ignored when id_configurations is provided)

by_n_param

Numeric (optional), maximum number of parameters to be displayed.

color_by_instances

Logical (default TRUE), choose how to color the lines. TRUE shows the number of instances evaluated by the configuration in the colores. FALSE to show the iteration number where the configuration was sampled.

filename

(character(1)) File name to save the plot, for example "~/path/example/filename.png".

Value

parallel coordinates plot

Details

The parameters to be included in the plot can be selected with the param_names argument. Additionally, the maximum number of parameters to be displayed in one plot. A list of plots is returned by this function if several plots are required to display the selected data.

To export the plot to a file, it is possible to do it so manually using the functionality provided by plotly (https://plotly-r.com/exporting-static-images). If a filename is provided, orca server will be used to export the plots and thus, it requires the library to be installed (https://github.com/plotly/orca).

Examples

iraceResults <- read_logfile(system.file(package="irace", "exdata",
                                         "irace-acotsp.Rdata", mustWork = TRUE))
parallel_coord(iraceResults)

# \donttest{ 
parallel_coord(iraceResults, by_n_param = 5)
#> [[1]]
#> 
#> [[2]]
#> 
parallel_coord(iraceResults, only_elite = FALSE)

parallel_coord(iraceResults, id_configurations = c(20, 30, 40, 50, 100))

parallel_coord(iraceResults, param_names = c("algorithm", "alpha", "rho", "q0", "rasrank"))

parallel_coord(iraceResults, iterations = c(1, 4, 6))

# }