How to speed up the 'dde23' solver?

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Shan Yin
Shan Yin il 9 Apr 2019
Commentato: Shan Yin il 11 Apr 2019
Dear all,
I try to use the solver 'dde23' to simulate the time-dealy differential equation with single constant delay. But the running time of the solver is too long. Is there any way to speed up the solver without reducing the calculation accuracy?
The main part of my code is attached as follows:
clear all
clc
kc=0.884;
lags=[1.2265834];
tspan=[0,2000];
options=ddeset('RelTol',1e-8,'AbsTol',1e-8,'MaxStep',0.05);
sol=dde23(@(t,y,Z)ddefun(t,y,Z,kc),lags,@(t)history(t),tspan,options);
  6 Commenti
Jan
Jan il 10 Apr 2019
@Shan Yin: Steven's suggestion is smarter than storing the parameters persistently inside the function. It is the nature of parameters to be defined separately. But bother methods should be a benefit for the run time also.
Shan Yin
Shan Yin il 11 Apr 2019
@Jan @ Steven Lord. Thanks for your nice suggestions!

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