Sampling distance Plot — sampling

The sampling_distance function creates a plot that displays the mean of the distance between the configurations that were executed in each iteration.

For categorical parameters the distance is calculated as the hamming distance, for numerical parameters a equality interval is defined by a threshold specified by argument t and hamming distance is calculated using this interval.

sampling_distance(
  irace_results,
  type = c("boxplot", "line", "both"),
  t = 0.05,
  filename = NULL
)

Arguments

irace_results: The data generated when loading the .Rdata file created by irace (or the filename of that file).
type: String, (default "boxplot") Type of plot to be produces, either "line", "boxplot" or "both". The "boxplot" setting shows a boxplot of the mean distance of all configurations, "line" shows the mean distance of the solution population in each iteration, "both" shows both plots.
t: Numeric, (default 0.05) percentage factor that will determine a distance to define equal numerical parameter values. If the numerical parameter values to be compared are v1 and v2 they are considered equal if |v1-v2| <= |ub-lb|*t.
filename: (character(1)) File name to save the plot, for example "~/path/example/filename.png".

Value

line or box plot

Examples

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

# \donttest{
sampling_distance(iraceResults, type = "boxplot", t=0.07)

# }