Mathematics & Science Learning Center
Computer Laboratory

Applications of Systems of Differential Equations

Predator-Prey Problems

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The request for syntax should have returned:

?ParametricPlot

ParametricPlot[{f_x, f_y},{u, u_min, u_max}] generates a parametric plot of
   a curve with x and y coordinates f_x and f_y as a function of u.
ParametricPlot[{{f_x, f_y},{g_x, g_y},…},{u, u_min, u_max}] plots several
   parametric curves.
ParametricPlot[{f_x, f_y},{u, u_min, u_max},{v, v_min, v_max}] plots a parametric
   region.
ParametricPlot[{{f_x, f_y},{g_x, g_y},…},{u, u_min, u_max},{v, v_min, v_max}] plots
   several parametric regions.  >>

It looks like the first form shown above is exactly what we need. Let's have Mathematica parametrically plot rab1 and fox1, and assign the graph to the variable rabfoxplot1.

Issue the following command:

rabfoxplot1=ParametricPlot[{rab1,fox1},{t,0,10}]

Now let's go see what you should have gotten...

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