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ODE45- How to pass parameters out

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B. J.
B. J. 2012-5-2
Hi, Can anyone tell me how I can pass parameters out of a ODE when they are not being calculated as part of the differential equation but are subsidiary values. Wha I want to do is write them out at the end of a successful timestep (i.e. not get the values calculated with trial time step sizes)?
Is there a clever way to use global to do this?

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回答（1 个）

Richard Brown
Richard Brown 2012-5-2
Why don't you just solve your ODE first, and then call the RHS function, modified to print out your parameters of interest, at the timestep values?
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Jan
Jan 2012-5-3
There is no reliable way to check inside the ODE function, if a step is a trial or accepted step. Function evaluations can be used to find event values also.

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