nxn-imitate-if-better-noise-efficient-tick-I-played-last-profiler.nlogo

extensions [profiler]

globals [
  payoff-matrix
  n-of-strategies
]

breed [players player]

players-own [
  strategy
  strategy-after-revision
  payoff
  ;; played?            <== deleted line
  tick-I-played-last ;; <== new line
]

to show-profiler-report
  setup                  ;; set up the model
  profiler:start         ;; start profiling
  repeat 1000 [ go ]     ;; run something you want to measure
  profiler:stop          ;; stop profiling
  print profiler:report  ;; print the results
  profiler:reset         ;; clear the data
end

to setup
  clear-all
  no-display
  setup-payoffs
  setup-players
  setup-graph
  reset-ticks
  update-graph
end

to setup-payoffs
  set payoff-matrix read-from-string payoffs
  set n-of-strategies length payoff-matrix
end

to setup-players
  let initial-distribution read-from-string n-of-players-for-each-strategy

  if length initial-distribution != length payoff-matrix [
    user-message (word "The number of items in\n"
      "n-of-players-for-each-strategy (i.e. "
      length initial-distribution "):\n"
      n-of-players-for-each-strategy
      "\nshould be equal to the number of rows\n"
      "in the payoff matrix (i.e. "
      length payoff-matrix "):\n"
      payoffs
    )
  ]

  let i 0
  foreach initial-distribution [ j ->
    create-players j [
      set payoff 0
      set strategy i
      set strategy-after-revision strategy
      ;; set played? false         <== deleted line
      set tick-I-played-last -1 ;; <== new line
    ]
    set i (i + 1)
  ]

  set n-of-players count players
end

to setup-graph
  set-current-plot "Strategy Distribution"
  foreach (range n-of-strategies) [ i ->
    create-temporary-plot-pen (word i)
    set-plot-pen-mode 1
    set-plot-pen-color 25 + 40 * i
  ]
end

to go
  update-n-of-players
  ;; ask players [set played? false] <== deleted line
  ask players [
    if (random-float 1 < prob-revision) [
      update-strategy-after-revision
    ]
  ]
  ask players [update-strategy]
  tick
  update-graph
end

to update-payoff
  let mate one-of other players
  set payoff item ([strategy] of mate) (item strategy payoff-matrix)
  ;; set played? true <== deleted line
  set tick-I-played-last ticks ;; <== new line
end

to update-strategy-after-revision
  ifelse random-float 1 < noise
    [ set strategy-after-revision (random n-of-strategies) ]
    [
      let observed-player one-of other players

      if (tick-I-played-last < ticks) [update-payoff]   ;; <== modified line
      ask observed-player [                             ;; <== modified line
        if (tick-I-played-last < ticks) [update-payoff] ;; <== modified line
      ]                                                 ;; <== modified line

      if ([payoff] of observed-player) > payoff [
        set strategy-after-revision ([strategy] of observed-player)
      ]
    ]
end

to update-strategy
  set strategy strategy-after-revision
end

to update-graph
  let strategy-numbers (range n-of-strategies)
  let strategy-frequencies map [ n ->
        count players with [strategy = n] / n-of-players
      ] strategy-numbers

  set-current-plot "Strategy Distribution"
  let bar 1
  foreach strategy-numbers [ n ->
    set-current-plot-pen (word n)
    plotxy ticks bar
    set bar (bar - (item n strategy-frequencies))
  ]
  set-plot-y-range 0 1
end

to update-n-of-players
  let diff (n-of-players - count players)

  if diff != 0 [
    ifelse diff > 0
    [ repeat diff [ ask one-of players [hatch-players 1] ] ]
    [ ask n-of (- diff) players [die] ]
  ]
end
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