Netlogo 模型非常慢并且在每个 tick 之间有延迟

Question

我创建的模型非常慢。我是 Netlogo 的初学者，不确定是我的代码效率低下还是我的系统配置有问题。

我有一个 35 x 35 的网格，我的大部分操作都是基于补丁的，即每个补丁都必须找到最近和最远的海龟以及它们的距离，并基于此执行其他操作。此外，在基于 if-else 逻辑的每个 tick 中，不满足条件的补丁使用 scale-color 函数通过渐变变为白色，而满足条件的补丁必须采用最近的海龟的颜色。

我可以post代码但不想垃圾邮件，请指教。谢谢

下面的一段代码似乎有问题。

to update-support

  ask patches [
    set closest-party min-one-of parties [distance myself]
    set closest-party-dist [distance myself] of closest-party
    set farthest-party max-one-of parties [distance myself]
    set farthest-party-dist [distance myself] of farthest-party

    set f 0
    set h 0

    set f ( -1 / ( [my-old-size] of closest-party / sum[my-old-size] of parties )) * (closest-party-dist ^ 2)
    set h ( [my-old-size] of farthest-party / sum[my-old-size] of parties ) * (farthest-party-dist ^ 2)

    set b-c (f + h)

    ifelse (b-c <= threshold)
    [ set votes-with-benefit 0 set pcolor scale-color white citizen-share 0 max-citizen-share ]
    [ set votes-with-benefit citizens set pcolor scale-color ([color] of closest-party) citizen-share 0 max-citizen-share]
  ]


   ask parties [ set my-size sum [votes-with-benefit] of patches with [closest-party = myself]
    ;set my-benefit mean[b] of patches with [closest-party = myself]
    set my-benefit-chen mean[b-c] of patches with [closest-party = myself]
  ]


  set largest-party max-one-of parties [my-size]

end

参与方的数量是动态的 - 可以在 2 到 10 之间。更新支持模块在设置和运行中都被调用。下面是代码：

to setup
  clear-all
  setup-citizens
  setup-parties
  update-support
  setup-plot
  reset-ticks
end

to go
  ask parties [ adapt set my-old-size my-size ]
  update-support
  plot-voter-support
  plot-voter-turnout
tick
end

问候尤瓦拉吉

Answer 1

第一个简单的修复，如果你多次使用补丁集，创建一次然后调用它。所以：

ask parties [ set my-size sum [votes-with-benefit] of patches with [closest-party = myself]
set my-benefit-chen mean[b-c] of patches with [closest-party = myself]
]

变成（并且更容易阅读，如果您稍后更改条件，也能确保一致性）

ask parties
[ let my-patches patches with [closest-party = myself]
  set my-size sum [votes-with-benefit] of my-patches
  set my-benefit-chen mean[b-c] of my-patches
]

以类似的方式，你在代码中有两次sum[my-old-size] of parties（计算f和h），你实际上一遍又一遍地计算它，因为你要求每个补丁运行这段代码.你应该计算一次然后使用它：

to update-support
  let old-total sum [my-old-size] of parties
  ask patches
  [ ...
    set f ( -1 / ( [my-old-size] of closest-party / old-total )) * (closest-party-dist ^ 2)
    set h ( [my-old-size] of farthest-party / old-total ) * (farthest-party-dist ^ 2)
    set b-c (f + h)
    ...
  ]
  ...
end

这些变化能带来多大的改善主要取决于参与方的数量。请尝试一下，看看是否解决了问题。

Netlogo 模型非常慢并且在每个 tick 之间有延迟

Netlogo model is extremely slow and has a delay between each tick

patch

netlogo