Hello,
I have a simple system of ODE;
function xdot=test(t,x);
xdot=[
2*x(1)*(1-x(1)/2000)-(15*x(1)*x(2))/(x(1)+70);
1*x(2)*((15*x(1))/(x(1)+70)-9)];
return;
tspan=[0 50]; x0=[1000;20];
options=odeset('RelTol',0.01);
[t,x]=ode23('test',tspan,x0,options);
plot(t,x, '-')...
