GetLeastContribution function

Get least HV contribution

Get the hypervolume (HV) contribution of the individual with least HV contribution.

GetLeastContribution(
  populationObjective,
  reference = NULL,
  method = "exact",
  ref_multiplier = 1.1
)

Arguments

• populationObjective: The objective value of the corresponding individual
• reference: The reference point for computing HV
• method: the HV computation method
• ref_multiplier: Multiplier to the nadir point for dynamic reference point location

Returns

The HV contribution value of the least contributor.

Examples

nObjective <- 5 # the number of objectives
nPoint <- 10 # the number of points that will form the hypervolume
objective <- matrix(stats::runif(nObjective*nPoint), nrow = nObjective, ncol = nPoint)
numpyready <- reticulate::py_module_available('numpy')
pygmoready <- reticulate::py_module_available('pygmo')
py_module_ready <- numpyready && pygmoready
if(py_module_ready) # prevent error on testing the example
GetHypervolume(objective,,"exact") # no reference supplied

reference <- rep(2,nObjective) # create a reference point at (2,2,2,2,2)
if(py_module_ready) # prevent error on testing the example
GetLeastContribution(objective,reference,"exact")