[Octave-patch-tracker] [patch #8418] Changeset for function ode15s (preliminary version)

[Pooja Rao]

URL:
  <http://savannah.gnu.org/patch/?8418>

                 Summary: Changeset for function ode15s (preliminary version)
                 Project: GNU Octave
            Submitted by: prao
            Submitted on: Mon 24 Mar 2014 05:43:28 AM 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:

This is an initial changeset for function ode15s (from jwe's implementation
patch #8102) to the ode-pkg. I have added two options ('InitialStep' and
'MaxStep') to this function along with changing the way it outputs its
solution. Earlier, it would take [tstart tfinal] as the time input vector and
produce output only at tstart and tfinal (because it uses LSODE /DASRT). To
make it produce solution values at points between tstart and tfinal, I used
linspace in the ode15s file. This is a temporary workaround.  I also added a
test and a couple of demos at the end.    

The following is a brief list of TO-DOs for ode15s:

1) Add options to make it more Matlab compatible
2) Replace linspace with a more adaptive output 
3) Replace LSODE with DASPK/DASRT  so it solves DAEs.
In its current form it uses DASRT but only when the 'Events'  option is
non-empty.



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File Attachments:


-------------------------------------------------------
Date: Mon 24 Mar 2014 05:43:28 AM GMT  Name: added_ode15s.diff  Size: 6kB  
By: prao

<http://savannah.gnu.org/patch/download.php?file_id=31019>

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