netlogo - 如何将幂律可能性添加到 Netlogo 模型

Question

我想在遵循幂律的环境 ABM 中添加自然灾害的可能性（通常很少损坏，不太常见的中等损坏，很少有强烈的损坏，很少有完全损坏）。

到目前为止，我编写了以下代码：

to environment ;environmental hits
   create-hits 1 [ ; I do not know if it makes sense to do that?
     set shape "circle"
     set color white
     set size 0.05
     setxy random-xcor random-ycor
   ]
   ask hits [
     ifelse pcolor = red [die] ;if already red, then stop
     [ ask n-of random (count patches) patches [ set pcolor red ]]  ;otherwise turn red on an random amount of patches
   ]
end

现在，我不知道如何添加“命中”的强度（因此，可以影响多少补丁）以及发生（或不发生）的可能性（根据幂律）的随机因素) 每个刻度。有人可以帮帮我吗？

这是最终代码（由 Alan 回答）：

to environment 
   create-hits 1 [
     set shape "circle"
     set color white
     set size 0.05
     setxy random-xcor random-ycor
   ]
   ask hits [
     let %draw (random-float 100)
     let %strength 0  ;; no damage
     if (%draw < 50) [set %strength (%strength + 1)]  ;;1 for little damage
     if (%draw < 10) [set %strength (%strength + 1)]  ;;2 for middle damage
     if (%draw < 5) [set %strength (%strength + 1)]  ;;3 for strong damage
     if (%draw < 1) [set %strength (%strength + 1)]  ;;4 for complete destruction

     ifelse pcolor = red [die]
     [ ask n-of %strength patches [ set pcolor red ]]
   ]
end

Answer 1

这只是@Mars 评论的详细说明。

to-report hit-strength
  let %draw (random-float 100)
  let %strength 0  ;; no damage
  if (%draw < 50) [set %strength (%strength + 1)]  ;;1 for little damage
  if (%draw < 10) [set %strength (%strength + 1)]  ;;2 for middle damage
  if (%draw < 5) [set %strength (%strength + 1)]  ;;3 for strong damage
  if (%draw < 1) [set %strength (%strength + 1)]  ;;4 for complete destruction
  report %strength
end