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This is a forum for discussion about NetLogo, the agent-based modeling environment from the Center for Connected Learning and Computer-Based Modeling at Northwestern University. Students, teachers, researchers, and independent learners are all welcome.

This is a great place to post about how you're using NetLogo, or questions about how to create models using the NetLogo language and software.

If you have a programming question, Stack Overflow is another possible place to get help under the NetLogo tag.

For questions about creating software using the NetLogo API's, improving the NetLogo application, and creating new extensions for NetLogo, visit the netlogo-devel Google Group.

This group has replaced the old Yahoo Groups version of netlogo-users.

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Tim Verlaan, Michael Tamillow2

Apr 24

Seeking Solutions for Memory Management Issues with Large Network Model in NetLogo

That does not surprise me. Go to this website and search “headless”. Read the section under “Advanced

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Seeking Solutions for Memory Management Issues with Large Network Model in NetLogo

That does not surprise me. Go to this website and search “headless”. Read the section under “Advanced

Apr 24

Granigg Wolfgang, jeremy...@northwestern.edu2

Apr 23

Technical question regarding the correct/better start of NetLogo

For running the GUI in Windows, you can just use the NetLogo shortcuts installed in the start menu,

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Technical question regarding the correct/better start of NetLogo

For running the GUI in Windows, you can just use the NetLogo shortcuts installed in the start menu,

Apr 23

Rob Geiger, … dottie passmore8

Apr 22

Netlogo won't load

Having the same issue here in my school district. I can load the netLogo with Firefox or Safari on my

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Netlogo won't load

Having the same issue here in my school district. I can load the netLogo with Firefox or Safari on my

Apr 22

Apr 20

NetLogo foundation

Dear colleagues: A few days ago, I sent out a job announcement for executive director of our emerging

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NetLogo foundation

Dear colleagues: A few days ago, I sent out a job announcement for executive director of our emerging

Apr 20

Norman Jacknis, … Steve Railsback4

Apr 18

Limit on the number of agents?

We routinely run models with > 1000000 turtles. There are many reasons why performance can slow

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Limit on the number of agents?

We routinely run models with > 1000000 turtles. There are many reasons why performance can slow

Apr 18

abdul haseeb khan, Steve Scott2

Apr 10

game development

Export the points as a csv and import them into a game engine and assign the points geometry. You may

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game development

Export the points as a csv and import them into a game engine and assign the points geometry. You may

Apr 10

Ingrid Tsoi, Jacob Kelter2

Apr 9

virus model with mask

Hi Ingrid, Right now this is phrased as a vague question and you included lots of code that isn't

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virus model with mask

Hi Ingrid, Right now this is phrased as a vague question and you included lots of code that isn't

Apr 9

zahidullah sherzad, Aaron Andre Brandes2

Apr 5

Issues with NetLogo Web Simulation Conversion

Hi, We are sorry you have encountered this problem. Unfortunately the nw extension, which you are

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Issues with NetLogo Web Simulation Conversion

Hi, We are sorry you have encountered this problem. Unfortunately the nw extension, which you are

Apr 5

Iara Vilela, Christopher Ruebeck5

Apr 5

How to make a simple list out of a list of list?

Iara Vilela 20:56 (há 1 minuto) para netlogo-users, Christopher Thank you very much. That's

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How to make a simple list out of a list of list?

Iara Vilela 20:56 (há 1 minuto) para netlogo-users, Christopher Thank you very much. That's

Apr 5

Yuyang Zhang, … diego diaz4

Apr 3

Error in NLStart while running RNetLogo package

Hi i was struggling with those paths too, so at the end i decide tu use another extension named

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Error in NLStart while running RNetLogo package

Hi i was struggling with those paths too, so at the end i decide tu use another extension named

Apr 3

Mar 3

Need master trainer for offline social simulation training in the area of technology adoption and diffusion in India.

Dear Experts, Greetings from ICAR-NRRI, INDIA We are in the process of finalizing a project on

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Need master trainer for offline social simulation training in the area of technology adoption and diffusion in India.

Dear Experts, Greetings from ICAR-NRRI, INDIA We are in the process of finalizing a project on

Mar 3

Mané Sarkissian

Feb 26

RK4 integration in the netlogo python extension.

Hi everyone! Does anybody know how to implement the 4th order runga-kutta integration in the python

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RK4 integration in the netlogo python extension.

Hi everyone! Does anybody know how to implement the 4th order runga-kutta integration in the python

Feb 26

david familian, Aaron Andre Brandes8

Feb 23

Access Python not working

Hi David, pynetlogo is an independently developed and maintained project that makes use of NetLogo.

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Access Python not working

Hi David, pynetlogo is an independently developed and maintained project that makes use of NetLogo.

Feb 23

Rebecca Goldberg, Charles Jui3

Feb 8

netlogo in linux (and in R if possible)

I'm sorry I should've mentioned my parallelization attempts. Yes, the code I shared was using

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netlogo in linux (and in R if possible)

I'm sorry I should've mentioned my parallelization attempts. Yes, the code I shared was using

Feb 8

c.pecor...@gmail.com

Jan 26

Course - AGENT-BASED MODELLING USING NETLOGO - University of Lodz (Poland)

Dear all, Unlock the power of Agent-Based Modelling (ABM) with our upcoming five-day course on "

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Course - AGENT-BASED MODELLING USING NETLOGO - University of Lodz (Poland)

Dear all, Unlock the power of Agent-Based Modelling (ABM) with our upcoming five-day course on "

Jan 26

Luka Grgičević, … Paolo Gaudiano3

Jan 26

WHO number separately for each BREED

I just had to do something similar mostly for convenience: I have a simulation with several breeds (

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WHO number separately for each BREED

I just had to do something similar mostly for convenience: I have a simulation with several breeds (

Jan 26

Diego Morales Bader

Jan 22

How can I compare ABMs using information criterion techniques (AIC or BIC)?

I have two models in which I compare the differences with real data on eight variables. However, in

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How can I compare ABMs using information criterion techniques (AIC or BIC)?

I have two models in which I compare the differences with real data on eight variables. However, in

Jan 22

Katie Tseng, … Luka Grgičević3

Jan 5

Drawing from a binomial distribution

Hi, You can do it this way as well, without the extension: ; The following two function computes

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Drawing from a binomial distribution

Hi, You can do it this way as well, without the extension: ; The following two function computes

Jan 5

Samir Saidi, … James Steiner4

Jan 3

Erratic movement, tick, and teleportation issues

It is as was suggested: you are committing the common mistake of using ASK _____ inside a procedure

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Erratic movement, tick, and teleportation issues

It is as was suggested: you are committing the common mistake of using ASK _____ inside a procedure

Jan 3

Jessica, … James Steiner10

Jan 3

Help! Why does my model run properly at one scale, but not another

Hi James, Thank you so much for your suggestion! It worked like a charm, and is a much more elegant

unread,

Help! Why does my model run properly at one scale, but not another

Hi James, Thank you so much for your suggestion! It worked like a charm, and is a much more elegant

Jan 3

Maiden, James Steiner2

12/29/23

place turtles by probability related to value distribution

It sounds like you need to use a "roulette-wheel" selection process. The Lottery example

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place turtles by probability related to value distribution

It sounds like you need to use a "roulette-wheel" selection process. The Lottery example

12/29/23

Toprak Ekici, James Steiner4

12/29/23

Looking for a mentor

Hey, I don't see anything in spam, trash, etc. Not sure what happened there. Perhaps try the

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Looking for a mentor

Hey, I don't see anything in spam, trash, etc. Not sure what happened there. Perhaps try the

12/29/23

James Steiner, Inderasan Munien2

12/29/23

Shape Library Viewer (New and Improved)

Hi James Hope you are doing well. IS it possible I could private message you? Thank you. On Thursday

unread,

Shape Library Viewer (New and Improved)

Hi James Hope you are doing well. IS it possible I could private message you? Thank you. On Thursday

12/29/23

Zohreh Jalalifahim

12/19/23

Define Modeling

Hello Dear. I am Zohreh Jalalifahim a student in MSC Information Technology Management in Berlin. I

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Define Modeling

Hello Dear. I am Zohreh Jalalifahim a student in MSC Information Technology Management in Berlin. I

12/19/23

Mwanga Levi, Aaron Andre Brandes2

12/18/23

Issue Loading Simulation for Virtual Lab Assignment

Hi Levi, You should probably seek help from whoever has given you the assignment. Otherwise perhaps

unread,

Issue Loading Simulation for Virtual Lab Assignment

Hi Levi, You should probably seek help from whoever has given you the assignment. Otherwise perhaps

12/18/23

12/16/23

Masked mirroring of view in hubnet client

Dear community, I am working on a HubNet activity where turtles harvest a patch property resource.

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Masked mirroring of view in hubnet client

Dear community, I am working on a HubNet activity where turtles harvest a patch property resource.

12/16/23

Laura Di Lucchio

12/16/23

calculating differences between values of variable at different times

Hi everybody, I should calculate the difference between a value that a variable assumes during one

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calculating differences between values of variable at different times

Hi everybody, I should calculate the difference between a value that a variable assumes during one

12/16/23

Don Braxton, … James Steiner3

12/13/23

"of" reports nobody sometimes

This is the kind of involved code that would benefit from using a few local variables to hold

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"of" reports nobody sometimes

This is the kind of involved code that would benefit from using a few local variables to hold

12/13/23

jaime iturrieta, … Aaron Andre Brandes3

12/11/23

HELP. I don't know how to do this

Hi Jaime, Another approach is to get a png of the whole interface using File => Export=> Export

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HELP. I don't know how to do this

Hi Jaime, Another approach is to get a png of the whole interface using File => Export=> Export

12/11/23

James Steiner, Aaron Andre Brandes2

12/11/23

Undocumented Behavior of Labels, Some Workarounds

Hi James, We can add a clarification of the label alignment For example: Turtle labels are currently

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Undocumented Behavior of Labels, Some Workarounds

Hi James, We can add a clarification of the label alignment For example: Turtle labels are currently

12/11/23

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