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From: Heather Moreland on 10 Feb 2010 13:34
Is there a way to have ode15s output the time step it is at as it iterates? I have a simulation that is running for an extremely long time and it would be helpful to be able to see what time step it was on.

Thanks,
Heather
From: Loren Shure on 10 Feb 2010 14:20
In article <hkuu6s$p9n$1(a)fred.mathworks.com>, heather.moreland(a)gmail.com
says...
> Is there a way to have ode15s output the time step it is at as it iterates? I have a simulation that is running for an extremely long time and it would be helpful to be able to see what time step it was on.
>
> Thanks,
> Heather
>

Do what Steve suggests and implement an OutputFcn that will execute each
time step. You can then output the time and anything else you want to
see.

--
Loren
http://blogs.mathworks.com/loren
http://matlabwiki.mathworks.com/MATLAB_FAQ
From: Heather Moreland on 11 Feb 2010 10:16
I have never used the OutputFcn option before. From what I have read, I have gathered that it requires

options=odeset('OutputFcn',@myfun);

[T,U]=ode15s(model,[0:dt:tfin],UINIT,options);

But I am not sure how to define @myfun so that it outputs each time step.
Any assistance would be great appreciated.


Loren Shure <loren.shure(a)mathworks.com> wrote in message <MPG.25dcd0f9b05b0f42989ab2(a)news.mathworks.com>...
> In article <hkuu6s$p9n$1(a)fred.mathworks.com>, heather.moreland(a)gmail.com
> says...
> > Is there a way to have ode15s output the time step it is at as it iterates? I have a simulation that is running for an extremely long time and it would be helpful to be able to see what time step it was on.
> >
> > Thanks,
> > Heather
> >
>
> Do what Steve suggests and implement an OutputFcn that will execute each
> time step. You can then output the time and anything else you want to
> see.
>
> --
> Loren
From: Steven Lord on 11 Feb 2010 10:43

"Heather Moreland" <heather.moreland(a)gmail.com> wrote in message
news:hl16vl$rff$1(a)fred.mathworks.com...
>I have never used the OutputFcn option before. From what I have read, I
>have gathered that it requires
>
> options=odeset('OutputFcn',@myfun);
>
> [T,U]=ode15s(model,[0:dt:tfin],UINIT,options);
>
> But I am not sure how to define @myfun so that it outputs each time step.
> Any assistance would be great appreciated.

The documentation I linked in my reply in this thread describes the exact
calling signature your myfun function should have and describes what each of
the inputs mean.

--
Steve Lord
slord(a)mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ


From: Heather Moreland on 11 Feb 2010 12:03
I am finding the documentation difficult to decipher in terms of how to define the approprate function myfun.

I have create an m-file with

function=status=myfun( )
but I am not sure what the arguments should be or how to define them to achieve the desired result.


"Steven Lord" <slord(a)mathworks.com> wrote in message <hl18js$far$1(a)fred.mathworks.com>...
>
> "Heather Moreland" <heather.moreland(a)gmail.com> wrote in message
> news:hl16vl$rff$1(a)fred.mathworks.com...
> >I have never used the OutputFcn option before. From what I have read, I
> >have gathered that it requires
> >
> > options=odeset('OutputFcn',@myfun);
> >
> > [T,U]=ode15s(model,[0:dt:tfin],UINIT,options);
> >
> > But I am not sure how to define @myfun so that it outputs each time step.
> > Any assistance would be great appreciated.
>
> The documentation I linked in my reply in this thread describes the exact
> calling signature your myfun function should have and describes what each of
> the inputs mean.
>
> --
> Steve Lord
> slord(a)mathworks.com
> comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ
>
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