如何限制代理在模型中可以建立的链接数? [英] How to limit the number of links an agent can make in a model?

问题描述

我正在建立一个模型，其中包含许多通过链接进行连接的代理，如下所示:

I'm setting up a model with a number of agents who are connected via links as follows:

ask turtles [create-links-with turtles in-radius vision with [self != myself]]

但是我希望能够限制单个代理可以建立的连接数.我尝试了几件事，但无济于事.

But I want to be able to limit the number of connections that an individual agent can make. I've tried a few things but to no avail.

希望可以为您提供帮助.

Hope you can help.

推荐答案

您可以像这样使用n-of原语获取随机选择的海龟子集进行链接:

You can get a randomly selected subset of turtles to link to using the n-of primitive like this:

ask turtles [create-links-with n-of 3 turtles in-radius vision with [self != myself]]

但是，如果您想要一个固定的上限，您将需要做一些棘手的事情，因为这不会阻止其他乌龟创建指向同一只乌龟的链接.如果您想要固定数量的链接(在下面的示例中为5)，则可以执行以下操作:

However, you will need to do something a bit trickier if you want a firm upper limit because this doesn't stop other turtles from creating links to the same turtle(s). If you want a fixed number of links (5 in example below), you can do this:

  ask turtles
  [ let new-links 5 - count my-links
    let candidates other turtles with [ count my-links < 5 ]
    create-links-with n-of min (list new-links count candidates) candidates
    [ ... ]
  ]

如果您只想要一个上限，则可以要求具有my-links> limit的所有乌龟随机选择要删除的适当数量的链接.因此，创建链接后，类似以下内容(未经测试):

If you simply want an upper limit, you could ask any turtles with my-links > limit to randomly select the appropriate number of links to delete. So, after creating links, something like this (not tested):

ask turtles with [count my-links > LIMIT]
[ if count my-links > LIMIT [ask n-of (count my-links - LIMIT) my-links [die]] ]    

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