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NetLogo is a programmable modeling environment for simulating natural and social phenomena. It was authored by Uri Wilensky in 1999 and has been in continuous development ever since at the Center for Connected Learning and Computer-Based Modeling.
NetLogo is particularly well suited for modeling complex systems developing over time. Modelers can give instructions to hundreds or thousands of "agents" all operating independently. This makes it possible to explore the connection between the micro-level behavior of individuals and the macro-level patterns that emerge from their interaction.
NetLogo lets students open simulations and "play" with them, exploring their behavior under various conditions. It is also an authoring environment which enables students, teachers and curriculum developers to create their own models. NetLogo is simple enough for students and teachers, yet advanced enough to serve as a powerful tool for researchers in many fields.
NetLogo has extensive documentation and tutorials. It also comes with the Models Library, a large collection of pre-written simulations that can be used and modified. These simulations address content areas in the natural and social sciences including biology and medicine, physics and chemistry, mathematics and computer science, and economics and social psychology. Several model-based inquiry curricula using NetLogo are available and more are under development.
NetLogo is the next generation of the series of multi-agent modeling languages including StarLogo and StarLogoT. NetLogo runs on the Java virtual machine, so it works on all major platforms (Mac, Windows, Linux, et al). It is run as a desktop application. Command line operation is also supported.
Features
System:
Cross-platform: runs on Mac, Windows, Linux, et al
International character set support
Programming:
Fully programmable
Approachable syntax
Language is Logo dialect extended to support agents
Mobile agents (turtles) move over a grid of stationary agents (patches)
Link agents connect turtles to make networks, graphs, and aggregates
Large vocabulary of built-in language primitives
Double precision floating point math
First-class function values (aka anonymous procedures, closures, lambda)
Runs are reproducible cross-platform
Environment:
Command center for on-the-fly interaction
Interface builder w/ buttons, sliders, switches, choosers, monitors, text boxes, notes, output area
Info tab for annotating your model with formatted text and images
HubNet: participatory simulations using networked devices
Agent monitors for inspecting and controlling agents
Export and import functions (export data, save and restore state of model, make a movie)
BehaviorSpace, an open source tool used to collect data from multiple parallel runs of a model
System Dynamics Modeler
NetLogo 3D for modeling 3D worlds
Headless mode allows doing batch runs from the command line
Display and visualization:
Line, bar, and scatter plots
Speed slider lets you fast forward your model or see it in slow motion
View your model in either 2D or 3D
Scalable and rotatable vector shapes
Turtle and patch labels
APIs:
controlling API allows embedding NetLogo in a script or application
extensions API allows adding new commands and reporters to the NetLogo language; open source example extensions are included
Whats New:
FEATURES CHANGES:
The autosuggest functionality introduced in NetLogo 6 will now display extension primitive names.
A new insert-item primitive was added to the language. It works similarly to replace-item, but without removing the item at the specified index.
A new set-plot-background-color primitive was added to the language. It can be used in plotting code to set the background color of the plot.
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