CODEWITHSUNDEEP
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Sarahdata
Sarahdata

Reputation: 339

How to select patches based on the same variable value in Netlogo

When one variable of a patch reaches a certain value (e.g. age = 75 ), I redirect the patch to another procedure (called retirement) where I want to select all the patches that share the same value of the variable Farm_ID so the procedure is applied to all the patches.

I'm looking for a command which mean "the same as", I also considered to use the to-report and report procedure to report the pxcor and pycor of the original patch and then ask the other patches with the same ID_Farm as the patch pxcor pycor But I feel like I'm missing something in the essence of using Netlogo (I'm a newbie).

to start-simulation
  reset-timer
  tick-advance 70
;; increase the farmer's age
 ask patches with [seed = 1] [set age age + 1]
 
  ask patches [
    if age = 75 [ retirement ]
  ]
;; other stuffs
end

to retirement
   ask patches with [ ID_Farm = ???]
;; procedure to change the variable ID_Farm depending on the closest patches with a different ID_Farm
end

Upvotes: 0

Views: 272

Answers (1)

Matteo
Matteo

Reputation: 2926

You need myself (see here), and more specifically you need to use variable = [variable] of myself.

See a minimal and reproducible example below:

to setup
  clear-all
  
  ask patches [
    ifelse (pxcor > 0)
      [set pcolor lime]
      [set pcolor orange]
  ]
end

to go
  ask one-of patches [
    type "I am the chosen patch. My color is " type (ifelse-value (pcolor = 25) ["orange"] (pcolor = 65) ["lime"] ["cyan"]) print ". I and all patches having my same color will become cyan."    
    operate-on-patches-with-my-same-color
  ]
end

to operate-on-patches-with-my-same-color
  ask patches with [pcolor = [pcolor] of myself] [
    set pcolor cyan
  ]
end

When you check the myself entry in the NetLogo Dictionary, note the difference between self and myself. At the beginning it may be confusing, but as you get more and more used with how NetLogo works it will become clear.

Upvotes: 2

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