config_bat: Configuration object for the Bat Algorithm

Description

Create a configuration object for the Bat Algorithm (BAT). At minimum the number of iterations (parameter iterations) and the number of bats (parameter population_size) have to be provided.

Usage

config_bat(
  iterations,
  population_size,
  iterations_same_cost = NULL,
  absolute_tol = NULL,
  initial_loudness = 1.5,
  alpha = 0.9,
  initial_pulse_rate = 0.5,
  gamma = 0.9,
  freq_min = 0,
  freq_max = 2
)

Value

config_bat returns an object of class BATConfig.

Arguments

iterations: maximum number of iterations.
population_size: number of bats.
iterations_same_cost: maximum number of consecutive iterations with the same (see the parameter absolute_tol) best cost before ending the minimization. If NULL the minimization continues for the number of iterations specified by the parameter iterations. Default is NULL.
absolute_tol: absolute tolerance when comparing best costs from consecutive iterations. If NULL the machine epsilon is used. Default is NULL.
initial_loudness: initial loudness of emitted pulses. Typical values are in the range [1, 2]. Default is 1.5.
alpha: parameter to control the linearly decreasing loudness with the iterations. It should be between 0 and 1. Default is 0.9.
initial_pulse_rate: initial rate at which pulses are emitted. It should be between 0 and 1. Default is 0.5.
gamma: parameter to control the exponentially decreasing pulse rate with the iterations. Defatul is 0.9.
freq_min: minimum frequency value of pulses. Default is 0.
freq_max: maximum frequency value of pulses. Default is 2.0.

References

yang2010newEmiR

Examples

Run this code

conf <- config_bat(iterations = 100, population_size = 50, iterations_same_cost = NULL,
absolute_tol = NULL, initial_loudness = 1.5, alpha = 0.9,
initial_pulse_rate = 0.5, gamma = 0.9,
freq_min = 0., freq_max = 2.)