Class: DRP::SearchAlgorithms::PSO::ParticleSwarmOptimizer

Inherits:
AbstractParticleSwarmOptimizer show all
Defined in:
lib/pso.rb

Instance Attribute Summary

Attributes inherited from AbstractParticleSwarmOptimizer

#global_best_error, #global_best_vector

Instance Method Summary collapse

Constructor Details

#initialize(swarm_size, vector_size, rebirth = 0.0) ⇒ ParticleSwarmOptimizer

Returns a new instance of ParticleSwarmOptimizer.



133
134
135
136
137
138
139
 
# File 'lib/pso.rb', line 133

def initialize swarm_size, vector_size, rebirth = 0.0
  @global_best_error = VERY_LARGE_NUMBER
  @num_reborn = (swarm_size * rebirth).to_i
  @rebirth_index = 0
  super swarm_size, vector_size
  init_particles Particle    
end

Instance Method Details

#each ⇒ Object 



141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
 
# File 'lib/pso.rb', line 141

def each
  rebirth
  best_this_time = VERY_LARGE_NUMBER
  @particles.each do |p|
    v = p.vector
    error = yield v
    if error < @global_best_error
      @global_best_vector = v.dup
      @global_best_error = error
    end
    if error < best_this_time
      best_this_time = error
    end
    p.optimize error
    p.roam
  end
  #puts best_this_time
end