how do i plot a delay differential equation

I've never use matlab to plot a dde before.I did go over the mathworks examples but have no idea how to plot one My dde is dy/dt=(1-y(t))*(y(t-p)-y(t-p-i) y(t)=0.0073;p=3;i=11

Answer 1

[Eric Lin]

The output of MATLAB's dde solvers is a structure that includes as fields the selected mesh and approximations to y(x) at the selected mesh points. You can simply pass these fields as inputs to "plot":

sol = dde23(@ddex1de,lags,@ddex1hist,[0,5]);
plot(sol.x,sol.y);

where the above lines are a snippet taken from the doc page DDE with Constant Delays

You can also use the deval function to evaluate the dde at points of your choosing and then plot those instead.