Why animated plot (using for loop) from a (sol) struct is too slow ?

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Moustafa Aboubakr
回答： Steven Lord 2017-5-7
I am solving the differential equations of a differential drive mobile robot using the ode23 solver and then plotting the results in an animated plot using a for loop. when i plot from
[t,s] = ode23(@Kpath, tspan, initials,[],p);
for j = 1:length(s(:,1))
q = plot(s(j,1),s(j,2),'ro','MarkerSize',5,'linewidth',1.5);
axis([-2.5 2.5 -2.5 2.5]);grid on;
pause(0.01)
delete(q)
end
the animation speed is normal however when i use the solution structure and then plot the results the animation is too slow ?
sol(i)= ode23(@mydglw4, tspan, initials,[],p);
initials = deval(sol(i),2);
t = linspace(0,2,100);
s = deval(sol(i),t);
is this related to the allocation of the struct ?

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回答（1 个）

Steven Lord
Steven Lord 2017-5-7
You're creating one line per point, then almost immediately deleting it. Instead, I would use odeset to specify odeplot as the OutputFcn. If you have to plot after finishing solving the ODE, instead consider using an animatedline instead of creating and deleting lines for each individual point.

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