Child of Fitness Landscapes

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Default-person Joan Puig (Author)

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Child of model Fitness Landscapes preview imageFitness Landscapes
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breed [ stayers stayer ] ;; static turtles
breed [ walkers walker ] ;; dinamic turrtles


globals[t meanfit max-elevation]
walkers-own [fitness]
stayers-own [f2]

to setup
  
  clear-all

  ask patches with [pzcor = 0]
  [
    sprout-stayers 1
    [
      create-links-with turtles-on neighbors4 
      ht ;; make the turtle invisible
    ]
  ]
end 

to mini-setup
  
  ask walkers [die]
  clear-plot
  reset-ticks
end 

to create-random-peak [optimx optimy altura gruix]
  

ask stayers
[
  set f2 f2 + altura * exp ( (-1) * ( ( (xcor - optimx) * (xcor - optimx)  + (ycor - optimy) * (ycor - optimy) ) / gruix ) )
]
end 

to setup-peak

  ask stayers with [pxcor = max-pxcor or pxcor = min-pxcor or pycor = max-pycor or pycor = min-pycor]
  [set f2 0]
  
  set max-elevation max [f2] of stayers
  
  ask stayers
  [
    set zcor (f2 / max-elevation) * ( max-pzcor - 10 ) ;;elevate the points (stayers)
  ]
end 

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to create-one-peak
  
  ask stayers [set f2 0]
  
  
  create-random-peak random-xcor random-ycor height width
  
  setup-peak
end 

to create-two-peaks
  
  ask stayers [set f2 0]
  
  
  
  create-random-peak random-xcor random-ycor height width
  create-random-peak random-xcor random-ycor height width
  
  setup-peak
end 

to landscape1
  
  ask stayers [set f2 0]
  
  
  
  repeat 10
  [ 
  create-random-peak random-xcor random-ycor random-float 1 random-float 30
  ]
  
  
  setup-peak
end 

to landscape2
  
  ask stayers [set f2 0]
  
  
  repeat 10
  [
  let r1 random-xcor
  let r2 random-ycor
  let h1 random-float 1
  let w1 random-float 150
  create-random-peak r1 r2 h1 w1
  ;show r1 
  ;show r2 
  ;show h1
  ;show w1
  ]
  
  setup-peak
end 

to landscape3
  
  ask stayers [set f2 0]

    create-random-peak random-xcor random-ycor 1 10
    create-random-peak random-xcor random-ycor 0.7 30
    create-random-peak random-xcor random-ycor 0.6 40
    create-random-peak random-xcor random-ycor 0.4 40
    create-random-peak random-xcor random-ycor 0.2 40
  
    setup-peak
end 

to landscape4
  
  
  create-random-peak 15 15 1 40
  create-random-peak -15 -15 1 40
  create-random-peak 15 -15 1 40
  create-random-peak -15 15 1 40
  
  setup-peak
end 

to setup-flattest
  
  
  create-random-peak 10 0 0.3 600
  create-random-peak -15 0 1 6
  
  setup-peak
end 
  
;; Crear les tortugues

to crear-elements
  
  ask n-of num-turtles stayers[
    hatch-walkers 1 [
      st
      set color red
      set shape "circle"
    ]
  ]
  reset-ticks
end 

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to p1
  
  repeat 50
  [
  create-random-peak random-xcor random-ycor 1 50
  ]
  
  setup-peak
end 
  



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to random-walk

ask walkers
[
  let here one-of stayers-here
  let there one-of [link-neighbors] of here
  move-to there
]
end 

to algoritm
  
  ask walkers
  [
    set fitness sum [f2] of stayers-here
  ]
  
  set meanfit mean [fitness] of walkers
 
  let survivor turtle-set (walkers with [fitness >= meanfit])
  let extinct turtle-set (walkers with [fitness < meanfit])
  
  ask extinct
  [
    if random-float 1 < probcol;; the turtle die
    [
      let a one-of stayers
      setxyz [xcor] of a [ycor] of a [zcor] of a 
    ]
    if random-float 1 < 1 - probcol;;the mother turtle has a "baby"
    [ 
      if count survivor != 0
      [
        let b one-of survivor 
        let c stayers with [ xcor = [xcor] of b and ycor = [ycor] of b and zcor = [zcor] of b ]
        move-to one-of [link-neighbors] of one-of c
      ]
    ]
    
  ]
end 

to go
  
  
  if ticks = 1000 and j300 [stop]
  
  tick
  
  repeat evolutive-speed [random-walk]
  algoritm
  
  set-current-plot-pen "pen-1"
  plotxy ticks meanfit
end 

There is only one version of this model, created almost 5 years ago by Joan Puig.

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Parent: Fitness Landscapes

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