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Newguy
Newguy

Reputation: 137

Color of turtles report

I make agents with a random-float color statement 

ask turtles [set color random-float 100 ]

I get color number such as 213.45 and 23.67. This is fine. My question however is how to count the frequency of a specific category of colors (for example: 213.45: 5 times) and the total number of colors. I need a reporter. I know how to list colors: 

to-report color-turtles
  report [color] of turtles
end

but I don't know how I can count them.

EDIT: . instead of ,

Upvotes: 1

Views: 158

Answers (1)

Alan
Alan

Reputation: 9620

First of all, when doing science, always use the point as a decimal separator.

Second, you need to say what you mean by a "specific category". If you truly mean specific (in your example, 213.45), then the answer is each category occurs once. (Or else there is something wrong with random-float.) So what you really need to do is histogram your data, where you specify the bins. Unfortunately, NetLogo does not build in this functionality. See https://github.com/NetLogo/NetLogo/issues/367

Here is how I would do it. Build a reporter procedure that puts each color in a category and report the category. (The simples approach would be to round to an integer.) Use the table extension to increment the count by 1 each time you encounter the category.

Edit:

If you already know the colors, you could get a count for any color by using

to-report countColor [#color]
  report count (turtles with [color = #color])
end

For example, 

to-report color-count
  let _colors remove-duplicates ([color] of turtles)
  let _cts   map [countColor ?] _colors
  report (map list _colors _cts)
end

Upvotes: 2

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