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I want to place turtles on each of the black patches(below Figure) at a specified step size: Therefore if step size less more turtles will be created/sprouted and more step size will result in less turtles. Code I use right now: ask patches with [pcolor = black][sprout-dead-turtles wall-agents [set color red]] This gives the following result: Previous question asked on same lines: Netlogo Sprouting turtles spaced at less than one patch Here: to fill-wall [ d ] set d precision d 1 ; make sure d is a multiple of 0.1 let n precision (d / 0.1) 0 ; interval at which to hatch ask one-of possible

I used the code from How to create cluster patches that do not overlap between them to build patches as shown in the first figure below. Here is the code : to make-cluster loop [ let cluster [patches in-radius (2 + random-float 2)] of one-of patches if all? (patch-set [neighbors] of cluster) [pcolor = black] [ ask cluster [ set pcolor green ] stop ] ] clear-all repeat 20 [ make-cluster ] When I use this code in a large spatial extent (i.e. 1000 x 1000 patches with patch size = 1 pixel), green patches are like circles (see the second figure below). How can I have patches as shown in the first

I have a file prepared in Excel that contans both text and numbers e.g line 1 would have MyAge 20 MyYear 1994. I save it as a .txt (text tab delimited) file and attempt to read it into Netlogo. When I open the file in Notepad, the numbers show as numbers and the text show with "". Netlogo does nto read the file saying "expecting a constant". If I remove the text or manually surround the text with quotes, then it works fine. So if my line read: "MyAge" 20 "MyYear" 1994, it owkrs ifne. It would be tedious for small data sets and near impossible for large data sets to manually add "' to all

How can I find the time it took to run a procedure in NetLogo? Using 'ticks' defined in NetLogo is inaccurate for my purposes. A vague idea would to subtract the system time at the start and end of procedure if possible. But I am unaware of any methods defined in NetLogo which would allow me to do this. Charles' suggestion of the profiler extension is a great. The profiler extension is incredibly useful. However, it may be overkill for your situation. Checkout reset-timer and timer . reset-timer sets an internal timer to 0, and then timer reports the amount of time that has passed since reset

I am having problems installing the R extension for NetLogo. I'm using NetLogo 5.05 and version 1.3 of the extension, which is supposed to work with R version 3.0 or higher. My version of R is 3.1.2. Following the instructions from this page , I have changed the .plist file within the NetLogo app so that it points to jri and to my R installation: <key>NSJavaRoot</key> <string>..</string> <key>LSEnvironment</key> <dict> <key>JRI_HOME</key> <string>/Library/Frameworks/R.framework/Resources/library/rJava/jri</string> <key>R_HOME</key> <string>/Library/Frameworks/R.framework/Resources</string> <

I have a NetLogo model that requires a turtle to record its distance travelled from point A to B. It is important that the distance is measured by the turtle rather than simply calculating the distance between the two points. I think something like turtles-own would be sufficient to store the distance it has travelled? Nicolas Payette I assume that you don't want to just use the distance from the original point because it's possible that your turtle has not traveled in a straight line? In any case, it is certainly possible to use a turtles-own variable. Here is a complete example: turtles-own

I'm trying to generate a list in NetLogo that contains several different unique lists of numbers 0 through n. For example, I have this line of code set mylists [[0 1 2] [0 2 1] [1 0 2] [1 2 0] [2 0 1] [2 1 0]] that I wrote to make all possible unique combinations of 0 1 and 2 without any repetition of the numbers within the lists. I would like to be able to the same thing but with a larger n. Is there an example of how to do this, or some sort of pseudocode algorithm that anyone knows of that I could check out? Thanks! If you don't mind a recursive solution, you could do this: to-report

I need to create a very large grid of patches to have GIS information of a very large network (such as a city-wide network). My question is how to get NetLogo to model such a world? When I set the max-pxcor and max-pycor to large numbers, it stop working. I need a world of for example size 50000 * 50000. Thanks for your help. See http://ccl.northwestern.edu/netlogo/docs/faq.html#howbig , which says in part: “The NetLogo engine has no fixed limits on size...” It's highly unlikely that you'll be able to fit a 50,000 x 50,000 world, in your computer though — that's 2.5 billion patches. Memory