NetLogo Models Library:
Sample Models/System Dynamics

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Logistic Growth

Run Logistic Growth in your browser uses NetLogo 5.0.4 requires Java 5 or higher (system requirements) Note: If you download the NetLogo application, every model in the Models Library (besides the Community Models) is included. If you have trouble running this model in your browser, you may wish to download the application instead.

## WHAT IS IT?

This is a model of a logistic growth curve using the System Dynamics Modeler.

## HOW IT WORKS

At each step the difference equations n * (1 - n) is calculated and added to the stock.

## HOW TO USE IT

Press the SETUP button, then press the GO button to run the model.

## THINGS TO NOTICE

View the STOCK monitor to see the current value of STOCK.

View the plot to observe the growth of STOCK over time.

## THINGS TO TRY

What do you think might happen if the initial value of stock is larger than 1? less than zero?

## NETLOGO FEATURES

This model uses the System Dynamics Modeler.

## RELATED MODELS

System Dynamics -> Exponential Growth

## HOW TO CITE

If you mention this model in a publication, we ask that you include these citations for the model itself and for the NetLogo software:

* Wilensky, U. (2005). NetLogo Logistic Growth model. http://ccl.northwestern.edu/netlogo/models/LogisticGrowth. Center for Connected Learning and Computer-Based Modeling, Northwestern Institute on Complex Systems, Northwestern University, Evanston, IL.
* Wilensky, U. (1999). NetLogo. http://ccl.northwestern.edu/netlogo/. Center for Connected Learning and Computer-Based Modeling, Northwestern Institute on Complex Systems, Northwestern University, Evanston, IL.

## COPYRIGHT AND LICENSE

Copyright 2005 Uri Wilensky.


This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.

Commercial licenses are also available. To inquire about commercial licenses, please contact Uri Wilensky at uri@northwestern.edu.

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