[scilab-Users] identify ode parameters scilab

[Samuel GOUGEON]

----- Message d'origine -----
De : Maso Ricci
Date : 06/08/2009 15:34:
> Dear Jérôme,
>
> thanks for your kind reply, sorry I was a little cryptic: yes I 
> intended the coefficients in the equation to describe it.
> For instance, if I try to solve the simple equation:
>
> dx/dt = -kx
>
> using the ‘ode ‘ function in Scilab, it is possible to solve the 
> equation for different value of the parameter ‘k’.
>
> What I am trying to do is slightly different. I would like to fit the 
> differential equation to experimental data in order to evaluate the k 
> parameter.
>
> Do you have any suggestions ?
Is x a simple variable ? Then, in a rough but possibly sufficient way,
you may compute dx/dt as finite differences, then compute -(dx/dt)/x
and finally average the resulting vector to assess k from each set of
your data.

Regards
Samuel