Netlogo:要求海龟数其邻居 [英] Netlogo: asking a turtle to count its neighbors

问题描述

我要一只海龟用下面的代码计算它相邻的健康海龟

I´m asking a turtle to count its neighboring turtles that are healthy with the following code

let healthy-neighbors count turtles-on neighbors with [infected? = false]

我得到以下信息:您不能使用 INFECTED?在补丁上下文中，因为感染?仅限海龟

I get the following: You can´t use INFECTED? in a patch context, because INFECTED? is turtle-only

我的错误一定是基本错误，但找不到，有什么帮助吗?

My mistake must be basic, but can't find it, any help?

推荐答案

NetLogo 将其视为 turtles-on (neighbors with [infected? = false)，并且由于 neighbors 给出了一组补丁，with 子句需要补丁，但补丁没有 infected?，正如错误中所说的那样.

NetLogo is seeing that as turtles-on (neighbors with [infected? = false), and since neighbors gives an agentset of patches, the with clauses is expecting patches, but patches do not have infected?, as it says in the error.

你可能想要的是让健康的邻居数(海龟的邻居)与[感染?= false].括号会告诉 NetLogo 先从相邻的瓦片中获取海龟，然后用 with 过滤它们.

What you probably want is let healthy-neighbors count (turtles-on neighbors) with [infected? = false]. The parentheses will tell NetLogo to get the turtles from the neighboring patches first, then filter them with with.

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