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I'd like to assign a random boolean variable to each turtle, but I'm not seeing a function that would simulate a draw from a Bernoulli distribution. This gets close, but it's awkward: ifelse random-in-range 0 1 < .5 [set expensive? false] [ set expensive? true ] Anyone know a better way? Bryan Head A few options: one-of [ true false ] random 2 = 1 random-float 1 < 0.5 - If you need to modify the probability, to get any Bernoulli distribution you want If I deal with a lot of probabilistic stuff in a model, I like to add to-report probability [ p ] report random-float 1 < p end as an easy

This question is related to this other question . I am trying to use RNetLogo with R and get the following error. nl.path <- "/Applications/NetLogo 5.1.0" NLStart(nl.path) Error in .jnew("nlcon/Preprocess") : java.lang.UnsupportedClassVersionError: nlcon/Preprocess : Unsupported major.minor version 51.0 From what I understood in this other question , the problem is that R is using an old version of Java which is incompatible with RNetLogo. I installed Java 8.0 hoping to solve the problem but my understanding is that, despite Java 8.0 being installed on my computer (Mac OS Maverick), R does not

Lists of agents and agentsets are two different data types in NetLogo (and can be converted with turtle-set and sort ). The documentation states that you use lists for an ordered collection of agents and sets for an unordered collection. It appears that anonymous procedures available to lists makes lists more flexible than agentsets. On the other hand, using 'ask' in combination with agentsets is more common in the example models and has been stated to be more readable. Can one translate any combination of list and anonymous procedure to a statement using an agentset and 'ask'? In particular,

I have turtles moving across the view, and I'd like to be able to follow where they go by making them leave a trail behind them, as though they were emitting smoke as they went. Of course, I could use the turtle pen ( pen-down ), but since there are many turtles, the view rapidly gets filled with old trails. The solution could be trails that last only for a few ticks before they dissipate. But I don't know how to achieve that. To be more specific: 1) Is there a technique for making the line drawn following a pen-down command gradually fade away over the period of some ticks? 2) If not, is

I want to write a NetLogo program to merge automobile lanes. Vehicles are in 4 lanes, separated by 3.5 meters (with each patch representing 1m). The center coordinates of each lane are at ycor values of -3.75, -7.25, -10.75 and -14.25. Vehicles have random xcor values with ycor values at the center of one of the lanes, and are heading to the right. I want the traffic to merge so that cars driving toward the center of the map ( distancexy 0 0 <50 ) all move to the same lane at ycor = -14.25 as pictured. So the car already in that lane continues forward, but the cars in other lanes turn right 45

Is NetLogo a good platform for big models (>10,000s of patches, turtles)? How can I speed up a model that runs very slowly? We just published an article on execution speed of NetLogo; it is available at: http://jasss.soc.surrey.ac.uk/20/1/3.html The article's main points are (a) NetLogo is not necessarily slow for executing large scientific models, and in fact has speed advantages over some alternatives; and (b) NetLogo models do often execute very slowly at first but can almost always be sped up dramatically by using a few basic techniques. We provide a step-by-step strategy for measuring and