ode output function problem

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Baha411
Baha411 on 16 May 2019
Commented: Baha411 on 17 May 2019
Hi,
I am using an output function for ode32s and I have a question regarding outputFcn.
Matlab ver 2018b,
On line 288 of ode32s:
feval(outputFcn,[t tfinal],y(outputs),'init',outputArgs{:});
On line 515 of ode32s however:
stop = feval(outputFcn,tout_new,yout_new(outputs,:),'',outputArgs{:});
Code is failing for too much input b/c in the latter there is one input missing with ''
Can you help me what's going on here?

Accepted Answer

Steven Lord
Steven Lord on 16 May 2019
As documented in the odeset function documentation page the function you specify as your custom OutputFcn must have a certain syntax and must accept certain types of calls.
"If you write a custom output function, then it must be of the form
status = myOutputFcn(t,y,flag)
The output function must also respond appropriately to these flags:"
You haven't provided much detail about the problem you're experiencing, but I suspect your custom OutputFcn does not conform to this requirement because it fails to accept the flag input argument.
  7 Comments
Baha411
Baha411 on 17 May 2019
Yes, my myOutputFcn function doesn't return anything.
Yes, status is needed.
Thanks for your help.

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