如何计算不是邻居的两个节点之间的总链路成本？

Question

我有一个网络，其中每个链接的成本计算如下：

ask links [ set link-cost sum [node-cost] of both-ends ]

如何计算不是邻居的两个节点之间的总链路成本（链路成本之和）？

to total-link-node [ a b ] ;; where a and b are nodes
ask a [ 
 print [link-cost] of (link-with b) ]
end 

gives "OF expected input to be a link agentset or link but got NOBODY instead"

提前感谢您的帮助。

Answer 1

以下是使用Seth建议的扩展NW中nw:path-to的可能解决方案（您也可以使用nw:weighted-path-to）：

to total-link-node [a b]
 ask a [ 
  show nw:path-to b 
  print sum (map [ [link-cost] of ? ] nw:path-to b) ]
end