Question

我有一个模型，其中雄龟根据阈值分类如下：

    ifelse(condition > threshold)  [set status 0 ] [set status 1]

我想计算满足这个阈值的人群中每个女性的潜在男性伴侣。我对其进行了编码，因此女性仅限于10个补丁半径的检测。如果没有男性达到此阈值，那么FR应该为0，否则它应该是一个比例。

      ask turtles with [sex = "female"] [if any? turtles with [sex = "male"] 
      in-radius 10 [ set potentialMates turtles with [sex = "male"] in-radius 10]
        ifelse any?  potentialMates with [anadromousM = 1] 
        [set FR count potentialMates with [anadromousM = 1] / count potentialMates ]
        [set FR 0]]

当我运行此操作时，我收到第二个any?

的错误

ANY？预期的输入是一个代理集，但得到了数字0。

我哪里错了？希望你能帮忙。

Answer 1

使用不同的缩进更容易看到。以下是您的代码（包含在过程名称中）。

to find-mate
  ask turtles with [sex = "female"]
  [ if any? turtles with [sex = "male"] in-radius 10
    [ set potentialMates turtles with [sex = "male"] in-radius 10
    ]
    ifelse any? potentialMates with [anadromousM = 1] 
    [ set FR count potentialMates with [anadromousM = 1] / count potentialMates ]
    [ set FR 0]
  ]
end

如您所见，无论ifelse的结果如何，都会对if any? turtles with [sex = "male"] in-radius 10进行测试（对于每只雌龟）。想象一下，这第一个if是false，然后潜在的匹配agentset永远不会被雄性乌龟创建。因此错误。你没有向我们展示首次实例化pontentialMates的代码 - 假设它是一个全局变量，那么它将具有值0。

我认为在半径中根本没有男性的情况下你希望FR为0。在这种情况下，试试这个。

to find-mate
  ask turtles with [sex = "female"]
  [ ifelse any? turtles with [sex = "male"] in-radius 10
    [ set potentialMates turtles with [sex = "male"] in-radius 10
      set FR count potentialMates with [anadromousM = 1] / count potentialMates
    ]
    [ set FR 0]
  ]
end

如果没有anadromousM = 1的potentialMates，则分子为0，0 / N为0.

如何从依赖于属性的代理集中进行选择？

1 个答案: