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Re: Solving ODE system in Octave


From: Thomas Treichl
Subject: Re: Solving ODE system in Octave
Date: Fri, 12 Jun 2009 10:20:06 +0200
User-agent: Thunderbird 2.0.0.21 (Macintosh/20090302)

timothy kinyanjui schrieb:
Hi all?
I have set up a system of differential equations to solve an age structured model for disease transmission. I have it running okay in MATLAB. However, I want to move to my models from MATLAB to Octave.
On running the model in Octave, it generates the following errors:
 > [time,Mv,M,S,I,R,Ir]=solve_rate1([0 30],3,beta,options);
Number of arguments supplied correct.

***** Integration in progress. Please wait... *****
--------------------------------
error: Unknown parameter name "BDF" or no valid parameter value
error: evaluating if command near line 278, column 9
error: evaluating switch command near line 55, column 5
error: evaluating for command near line 53, column 3
error: called from `odepkg_structure_check' in file `C:\Program Files\Octave\3.0.5_gcc-4.3.0\share\octave\packages\odepkg-0.6.4\odepkg_structure_check.m'
error: evaluating assignment expression near line 82, column 19
error: evaluating if command near line 75, column 5
error: evaluating if command near line 53, column 3
error: called from `ode45' in file `C:\Program Files\Octave\3.0.5_gcc-4.3.0\share\octave\packages\odepkg-0.6.4\ode45.m'
error: evaluating if command near line 66, column 5
error: evaluating while command near line 64, column 1
error: called from `solve_rate1' in file `d:\model_data\work\two_age_structure_model\solve_rate1.m'
octave-3.0.5.exe:15:d:\model_data\work\two_age_structure_model

Is there a missing package that I may be required to install. I have used the ODE solver: ode45.
Waiting to hear from you.
regards,
tim

Can you please send and output of your 'options' structure (and if you can send even more information about your code so that we can help)

  Thomas


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