[Octave-patch-tracker] [patch #8972] Adding a demo to ode23 and ode45

[Francesco Faccio]

URL:
  <http://savannah.gnu.org/patch/?8972>

                 Summary: Adding a demo to ode23 and ode45
                 Project: GNU Octave
            Submitted by: francesco_faccio
            Submitted on: Fri 08 Apr 2016 06:26:45 PM GMT
                Category: None
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Dear all,

I have prepared a demo that estimates a posteriori the convergence order of
ode23 and ode45. Since these methods use adaptive step size, I have used the
options RelTol and AbsTol to estimate the infinity norm of the error.
In this demo I have used as a benchmark test the problem y'=y(t), 0<t<1,
y(0)=1
A convergence plot shows that ode23 and ode45 have 3 and 5 order respectively.


In the next few days I will add a function that performs the initial check of
options of these methods. I will post a link of my account on bitbucket in the
mailing list in order to show you my progress. Any suggestion or criticism
will be welcome.

Best regards,

Francesco Faccio 



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File Attachments:


-------------------------------------------------------
Date: Fri 08 Apr 2016 06:26:45 PM GMT  Name: changesets  Size: 3kB   By:
francesco_faccio

<http://savannah.gnu.org/patch/download.php?file_id=36867>

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