Predator-Prey Models -- Matlab Version

Predator-Prey Models

Downloading Matlab Files

Matlab often requires more than one ".m" file for all the steps in a module. The necessary files for this module have been "packaged" into a single file for downloading. If you know what file type you need and what to do with it, you may download now by selecting from the following table. If you are not sure, please read the detailed instructions following the table.

Windows	Unix/Linux	Macintosh
ppmodel.zip (5K)	ppmodel.tar.gz (4K)
ppmodel.exe (29K)	ppmodel.tar (31K)	ppmodel.sea.hqx (39K)

Instructions for Downloading/Extracting Matlab Files

Please select from the following list your preferred form for downloading. Then save the downloaded file to the directory of your choice, and follow the instructions for "unpacking" it.

Self-extracting zip file for Windows (29K)

Save with .exe extension.
Run this file (double click on its name).
Save the extracted files in the directory of your choice.

Download this file now.

Zipped file for Windows -- requires a zip/unzip program (5K)

Save with .zip extension.
Run your Windows zip program to unzip the archive.
Save the extracted files in the directory of your choice.

Download this file now.

Tarred file for Unix/Linux (31K)

Save the file ppmodel.tar.
In your command window (not the Matlab window), cd to the directory where you saved the file, and enter the command

tar xvfp ppmodel.tar

Download this file now.

Zipped tar file for Unix/Linux (4K)

Save the file ppmodel.tar.gz.
In your command window (not the Matlab window), cd to the directory where you saved the file, and enter the command

gunzip ppmodel.tar.gz

Then enter the command

tar xvfp ppmodel.tar

Download this file now.

Self-extracting archive for Macintosh (39K)

Save the file ppmodel.sea.hqx.
Use the utility StuffIt Expander to extract the files. Or use the utility BixHex to create ppmodel.sea, and then run this application to extract the files.

Download this file now.

After you have saved your .m files, do the following:

Start Matlab.
If you saved your files in a directory that is not already in Matlab's path, use the addpath command to add your directory to the Matlab path.
Open a diary file in Matlab in order to save your work.
Open the first file for this module by typing on the Matlab command line:

ppmodel1

Start Part 1 of the module by clicking the Forward /graphics/button (or, if you prefer, return to Contents by clicking the Back /graphics/button).

modules at math.duke.edu