Faster than ODE45

2011 6 16
1 个回答
回答已采纳
4 次查看（30 天）

0 个投票

I would like to go faster than ode45 and ode 23 is there a way to change the input in:
[t,y]=ode23tb(@Gi,[0.000001;a],[1,0]);
so I could run my programs faster. I don't care if the precision drop a little bit. Thanks

请先登录，再回答此问题。

 采纳的回答

Matt Tearle
Matt Tearle 2011-6-16

0 个投票

ode23tb is more efficient for cruder tolerances, so make sure you use odeset to set the tolerances appropriately. RelTol and AbsTol are the settings to look at. (The defaults are 1e-3 and 1e-6, respectively.)
Also, ode23tb is for stiff systems. I assume you've already established that this is the case. If not, ode23 will be more efficient (again, setting RelTol and/or AbsTol appropriately).
opts = odeset('AbsTol',1e-3);
[t,y]=ode23tb(@Gi,[0.000001;a],[1,0],opts);
Creates a structure opts that contains the option settings, then passes that into ode23tb.

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Ordinary Differential Equations 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by