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NetLogo

NetLogo. Uri Wilensky Tutorial by Bin-Tzong Chie AI-Econ Research Center, National Chengchi University Department of Industrial Economics, Tamkang University. Outline. Introduction Build a Model Applets HubNet. NetLogo.

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NetLogo

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  1. NetLogo Uri Wilensky Tutorial by Bin-Tzong Chie AI-Econ Research Center, National Chengchi University Department of Industrial Economics, Tamkang University

  2. Outline • Introduction • Build a Model • Applets • HubNet

  3. NetLogo • NetLogo is a programmable modeling environment for simulating natural and social phenomena. It was authored by Uri Wilensky in 1999 and is in continuous development at the Center for Connected Learning and Computer-Based Modeling. • More Information • http://ccl.northwestern.edu/netlogo/docs/

  4. Download and Install • http://ccl.northwestern.edu/netlogo/

  5. Initial the NetLogo

  6. Exemplify a Model

  7. Example of El Farol Problem

  8. Three Main Tabs of a Model • Interface Tab • Information Tab • Procedure Tab

  9. Interface Tab World The Interface

  10. The World Setting

  11. Information Tab

  12. Procedure Tab

  13. Initial the Model

  14. Run the Model

  15. How does the Model work? • Global Variables • Agent’s Variables • Defined Procedures • Linked with Interface • Sub procedure • Without return values • With return values

  16. Global Variables globals [ attendance ;; the current attendance at the bar history ;; list of past values of attendance home-patches ;; agentset of green patches bar-patches ;; agentset of blue patches crowded-patch ;; patch where we show the "CROWDED" label ]

  17. Agent’s Variables turtles-own [ strategies ;; list of strategies best-strategy ;; index of the current best strategy attend? ;; true if the agent currently plans to attend the bar prediction ;; current prediction of the bar attendance ]

  18. Procedures Linked with Interface to setup ... ... end to go ... ... end Event Trigger

  19. Procedures as Sub-Procedureswithout return values to move-to-empty-one-of ... end to update-plots ... end to update-strategies ... end

  20. Procedures as Sub-Procedures with return values to-report predict-attendance ... report ... end to-report random-strategy ... report ... end

  21. Let’s Play

  22. Instance Interactive with the agents

  23. Stalk an Agent

  24. Save as Applet

  25. HubNet

  26. How to apply HubNet to startup setup hubnet-set-client-interface "COMPUTER" [] hubnet-reset end to go every 0.1 [ listen-clients display ] end

  27. to listen-clients to listen-clients ;; as long as there are more messages from the clients ;; keep processing them. while [ hubnet-message-waiting? ] [ ;; get the first message in the queue hubnet-fetch-message ifelse hubnet-enter-message? ;; when clients enter we get a special message [ create-new-student ] [ ifelse hubnet-exit-message? ;; when clients exit we get a special message [ remove-student ] [ ask students with [user-id = hubnet-message-source] [ execute-command hubnet-message-tag ] ;; otherwise the message means that the user has ] ;; done something in the interface hubnet-message-tag ;; is the name of the widget that was changed ] ] end

  28. HubNet Client Editor

  29. Do you want to go to the Bar

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