Model 1

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Samuel Lin (Author)

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patches-own [payoffmow payoffnomow trait] ;assigning the lawn a payoff if mow or if doesn't mow, and a trait

to setup
  clear-all
  reset-ticks
  set-default-shape turtles "flower"
end 

to go
  tick; move forward by one tick
  output-print(word  "\nRound " ticks)
  set-dandelion
  set-trait
end 

to set-dandelion
  let roll random 100    ;to prevent random from giving differenet values in my code
  if roll < p [
    output-print(word "Dandelions")
      if not any? turtles-on patch 0 0 [
       create-turtles 1 [
       set color yellow
       move-to patch 0 0
      ]
    ]
  ]
 if roll >= p [
    output-print(word "No Dandelions")
  ]
end 

; Note: MOWERS turn their lawn LIGHT GREEN
; DEFECTORS turn their lawn DARK GREEN

to set-trait
  ;; Check patch 0 0
  ask patch 0 0 [
    if any? turtles-here [
      set payoffmow (- c)
      set payoffnomow (- d)
    ]
   if not any? turtles-here [
      set payoffmow (- c)
      set payoffnomow 0
    ]

  output-print(word "payoffmow: " payoffmow)
  output-print(word "payoffnomow: " payoffnomow)

  ;; Decide trait
  if payoffmow > payoffnomow [
    set trait "Mower"
    output-print(trait)
    ask patch 0 0 [ set pcolor 66 ]
    if any? turtles-on patch 0 0 [
    output-print(word "Dandelions killed")
    ask turtles-on patch 0 0 [die]
      ]
  ]

  if payoffmow < payoffnomow [
    set trait "Defector"
    output-print(trait)
    if any? turtles-on patch 0 0 [
    output-print(word "Dandelions alive")
      ]
    ask patch 0 0 [ set pcolor 63 ]
  ]

  if payoffmow = payoffnomow [
    let coinflip random 2
    if coinflip = 0 [
      set trait "Mower"
      output-print(trait)
      ask patch 0 0 [ set pcolor 63 ]
      if any? turtles-on patch 0 0 [
      ask turtles-on patch 0 0 [die]
      output-print(word "Dandelions Killed")
        ]
    ]
    if coinflip = 1 [
      set trait "Defector"
      ask patch 0 0 [ set pcolor 66 ]
     if any? turtles-on patch 0 0 [
          output-print(word "Dandelions Alive")
    ]
  ]
    ]


  ]
end

There is only one version of this model, created 23 days ago by Samuel Lin.

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