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nlshadersp implements NL-SHADE-RSP: SHADE with exponential (non-linear) population size reduction and a ranked-based selective pressure mechanism that biases donor vector selection toward better-ranked individuals.

​
Usage

nlshadersp(
  NP = 40,
  G = 100,
  data,
  class.name,
  c = 0.1,
  structure = c("nb", "tancl", "tan", "hc"),
  pB = 0.05,
  edgelist = NULL,
  verbose = 25,
  ...
)

​
Parameters

​
NP
integer
default:"40"
Initial population size. Reduced non-linearly (exponentially) down to 4.
​
G
integer
default:"100"
Maximum generations.
​
data
data.frame
required
Data frame containing features and the class variable.
​
class.name
character
required
Name of the class variable column.
​
c
numeric
default:"0.1"
Adaptation rate for history memory. Must be in [0, 0.2].
​
structure
character
default:"nb"
BN structure: "nb", "tan", "tancl", or "hc".
​
pB
numeric
default:"0.05"
Fraction of best individuals for mutation strategy.
​
edgelist
matrix
Optional custom BN topology (edges × 2 matrix: from, to).
​
verbose
integer
default:"25"
Print progress every this many generations.
​
...
Extra arguments forwarded to bnclassify::tan_cl or bnclassify::tan_hc.

​
Return value

Object of class DE with fields: Best, BestCLL, pobFinal, CLLPobFinal, N.evals, convergence, evaluations.

​
Example

library(dplbnDE)
data(car)

result <- nlshadersp(
  NP = 20, G = 25,
  data = car,
  class.name = names(car)[7],
  c = 0.1, pB = 0.05,
  structure = "tan",
  verbose = 5
)
print(result)

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