[Scilab-users] Evaluate external function for Couple ODE's

[Tim Wescott]

If your L and X vectors are what I think they are, and if your external
equations are what I think they are, then wouldn't each one's output
depend only on the value of one column of X and the corresponding value
of L?

So, vectorize them and call (e.g.) F18(X, L), or F18(X(:, 42), L(42)).

On Tue, 2017-05-02 at 20:21 -0700, tiagorleite wrote:
> First of all, sorry if this is a silly question. I am getting
> practice in
> Scilab
> 
> I have a set of 8 coupled ODEs and a set of 28 "external equations".
> 
> One example of external equation is my volumetric flow rate:
> 
> function v=F18(FE,FY,FH,FM,FP,FA,FL,FB,P,T)
>     v=(v0*ro0)/F17()
> endfunction;
> 
> F17 is my density, which is depends on T, Pressure and total molar
> flow
> rate, and so on...
> 
> When I solve the coupled ODEs as: X=ode(Y0,L0,L,Y), where Y are my
> coupled
> ODEs vector, I get the values  for the variables of each differential
> equation.
> 
> My question is, how can I evaluate also the external functions?
> 
> I tried 'feval', but without success
> 
> Thank you!
> 
> 
> 
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-- 

Tim Wescott
www.wescottdesign.com
Control & Communications systems, circuit & software design.
Phone: 503.631.7815
Cell:  503.349.8432