If you haven’t done so already, press the “setup” button to initialize the model with current settings. Only the frequency of view updates has lessened. It hasn’t, as you can see by watching the tick counter race ahead. Note that if you push the speed slider well to the right, the view may update so infrequently that the model appears to have slowed down. Updating takes time, so fewer view updates means the model progresses faster. NetLogo will start skipping frames, that is, it won’t update the view at the end of every tick, only some ticks. When you move the speed slider to the right the model speeds up. You might even slow the model down so far as to see exactly what a single turtle is doing. That makes it easier to see what is happening. When you move the slider to the left the model slows down so there are longer pauses between each tick (time step). The speed slider allows you to control the speed of a model, that is, the speed at which turtles move, patches change color, and so on. The environment consists of patches (not mobile).Agents are called turtles (can be mobile).Attributes of agents (turtles), patches (environment agents)ĭefining Agents and the Environment in NetLogo:.There may also be additional sections, such as: NetLogo Features, Related Models, Credits, and How to Cite. What you see in plots and display when running model, as well as questions the model can answer.įuture enhancements or interesting modifications. SectionĪn overview of the functioning of the model, core behaviors, and model features.ĭescribes the buttons, sliders, and parameters. On this screen, you will find useful ‘meta’ information about the model. Using ‘Halt’ may interrupt the model in the middle of an action, which could create an error. You can also stop a model with the ‘Halt’ item on the Tools menu, but you should only do this if the model is stuck for some reason. Using a once button like this lets you watch the progress of the model more closely. Many models also have a once button called “go once” or “step once” which is like “go” except that it advances the model by one tick (time step) instead of over and over. There are two different types of buttons: ‘once’ and ‘forever’.īuttons without arrows, like the ‘setup’ button, perform a task once and then pop back up when the task is completed.īuttons with arrows, like the ‘go’ button, will run until the user manually stops the task by clicking the same button again. To initialize the model with its default setting, press the ‘setup’ button. When you first open the model, the Monitor is empty. The ‘+ Add’ button along the top toolbar allows one to add additional features to the interface. Monitors and plots are beige they display data. Sliders and switches are green they alter model settings. Buttons are blue they set up, start, and stop the model. These interface elements allow you to interact with the model. The Interface tab will fill up with lots of buttons, switches, sliders and monitors. Click on the model called “Wolf Sheep Predation”.Choose “Models Library” from the File menu.The NetLogo model library has many examples to explore. the ‘World’, used for real-time model visualization It has seveal parts: IDE ComponentĬontrol, run, and visualize model (current tab)ĭescription of model purpose, function, and features (middle tab) The window you see is called the NetLogo integrated development environment (IDE). Start the NetLogo application to begin a basic tour. Procedures to alter and extend existing models.Modifying model parameters with the UI to run experiments.Using the NetLogo user interface (UI) to run models.Note: This lesson is in alpha status! It may have issues that have not been addressed.
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