Parenthesis

Preben Alsholm — Thu, 07 Mar 2013 07:52:52 Z

You need a parenthesis:
with(DEtools):

Re

Kitonum — Thu, 07 Mar 2013 13:34:54 Z

To construct the phase curves you need:

1) Increase the range for the variable t .

2) Set the initial conditions.

Example (plotting of two phase curves):

with(DEtools):
sys := diff(x(t), t) = y(t), diff(y(t), t) = x(t)*(1-x(t)*x(t))+y(t);
DEplot([sys], [x(t), y(t)], t = 0 .. 3, x = -3 .. 3, y = -3 .. 3, [[x(0)=1, y(0)=2], [x(0)=-2, y(0)=1]],color = black);

MaplePrimes - answers and comments on Question, DEplot: Plot not appearing when doing a phase plot

Parenthesis

Re