问题描述:

I have the following code in the setup procedure in netlogo

 set-default-shape Mappers "target"

create-mappers MappersCounterSlider

[

set color red

set size 1.5 ;; easier to see

set label-color blue - 2

set xcor 10

set ycor random 11

]

I need to change the random 11 to a specific value for each turtle I create, for example if I have 5 turtles I want to have 5 turtles in diffrent 5 fixed positions.

网友答案:

If you need specific y coordinates for each turtle I am afraid you are going to have to set them yourself.

If you don't care about which turtle is at which y coordinate, you can have a list of possible y coordinates, which each turtle will then remove from to determine their y-coordinate

For example, if you needed the turtles to start at y coordinates 1, 2, 5, 8 and 9, create a list:

let y-coordinates (list 1 2 5 8 9)

Then when you create your turtles, set their y coordinate to be a random element removed from the list.

let remove-index random length y-coordinates
set ycor item remove-index y-coordinates
set y-coordinates remove-item remove-index y-coordinates 

That way, if you want to add any more fixed y-coordinates, you can simply add it to the list.

网友答案:

You can also specify the position during the create process by incrementing a global variable. Like the following:

globals [posn]

to setup
  set posn -10
  create-turtles 5
  [
    set color red
    set size 1.5  ;; easier to see
    set label-color blue - 2
    set xcor 10
    set posn posn + 3
    set ycor posn

  ]
end
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