[Octave-patch-tracker] [patch #8979] Add two functions to check and set ODE options

[Francesco Faccio]

URL:
  <http://savannah.gnu.org/patch/?8979>

                 Summary: Add two functions to check and set ODE options
                 Project: GNU Octave
            Submitted by: francesco_faccio
            Submitted on: Thu 14 Apr 2016 09:17:41 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:

These functions are a starting point for checking options and filling the
option structure of a generic ODE solver.

The first private function I have prepared is check_input.m:

[fun, trange, init, odeopts] = check_input (fun, trange, init, solver,
varargin)

that checks the correctness of the input and returns an option struct.

The second function is set_ode_options.m:

[fun, odeopts] = set_ode_options (fun, trange, init, odeopts, order, solver,
default_input)

that checks if options which are not allowed are passed, sets the default
options and fills the option struct.

default_input is a struct that at the beginning of each solver has to be
filled in order to specify which options are allowed and, if they are allowed,
which are their default values.
I have modified the code of ode23 and ode45 to use these two common private
functions. 

I would like to receive some suggestions in order to make these functions more
generic. I have removed the possibility of integrating using integrate_n_step
and integrate_const: only the adaptive integration is allowed (I made this
decision because I don't see a particular advantage using these methods and
because there's no Matlab incompatibility).

I would like also to write a private function that handles postprocessing,
stats and event detection for each solver.
Do you think it could be useful?



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File Attachments:


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Date: Thu 14 Apr 2016 09:17:41 PM GMT  Name: changeset.zip  Size: 10kB   By:
francesco_faccio

<http://savannah.gnu.org/patch/download.php?file_id=36928>

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