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maycca
maycca

Reputation: 4080

NetLogo: possible to select a patch by multiple criteria at one time step?

This question is more theoretical then practical. My patches have variables timber_value and harvest_cost.

Please, is in NetLogo a way how to select a patch with maximum timber value and minimal harvest cost in one 'ask' i.e. at the same time? I imagine that could be solved by adding variable difference (difference = timber_value - harvest_cost) and simply select the patch by ask max-one-of patches [difference].

However, I was wondering if there is another approach considering two variables (timber_value and harvest_cost) at the same time?

I can't really figure out better way then the one described...

Thank you for your shared knowledge and discussion !

Upvotes: 1

Views: 325

Answers (1)

Alan
Alan

Reputation: 9610

In general the answer is no, but this has nothing to do with NetLogo. To see the problem, create ordered pairs of values for the two attributes. Suppose you get [2 1] and [1 2]. How do you want to compare them? That said, you can get the largest timber value patches and then of them the lowest harvest cost patches.

patches-own [x y]

to test
  ca
  ask patches [
    set x random-float 1
    set y random-float 1
  ]
  show map [[list x y] of ?] 
    sublist
    sort-by compare patches
    0 10
end

to-report compare [#p1 #p2]
  let _x1 [x] of #p1
  let _x2 [x] of #p2
  let _y1 [y] of #p1
  let _y2 [y] of #p2
  report (_x1 < _x2) or (_x1 = _x2 and _y1 < _y2)
end

On the other hand, it seems in this case that you would be better off sorting by total profit. Since this is just a real number, none of these sorting issues arise.

Upvotes: 2

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