How to give ode45 just 1 time step?

19 次查看（过去 30 天）
Saiprasad Gore
Saiprasad Gore 2017-5-5
评论： Steven Lord 2021-4-20
If I give only one step by tspan = 0:0.01:0.01; then it takes many smaller steps automatically between 0 and 0.01 How can I force it to take just one step?

请先登录，再回答此问题。

采纳的回答

Jan
Jan 2017-5-5
ODE45 is an integrator with a step size control, which adjust the steps to satisfy the demands for accuracy. This helps to find the optimum between rounding and discretization errors. In consequence you can and should not force the integrator to use a specific step size.
Use a fixed step size integrator if you have any good reason to do so, but not ODE45.

更多回答（1 个）

Riyadh BELBECIR
Riyadh BELBECIR 2021-4-20
The smallest value can be taken is two steps
Example :
tspan = [0 1 2];
  1 个评论
Steven Lord
Steven Lord 2021-4-20
The values you specify as the tspan input to an ODE solver do not affect the steps the solver takes internally. If you specify more than 2 elements in tspan they specify the points at which the ODE solver returns the solution.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Ordinary Differential Equations 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by