[Metalab] OT: Matlab/Scilab/Octave Frage

Clifford Wolf clifford at clifford.at
Fri Dec 28 16:28:59 CET 2007


Hi again,

thanks Marius and Thomas, after getting some sleep its also not that
confusing anymore..  ;-)

On Fri, Dec 28, 2007 at 06:38:41AM +0100, Thomas Themel wrote:
> Hi,
> Marius Kintel (kintel at sim.no) wrote on 2007-12-28:
> > Exactly how such software packages solve differential equations  
> > numerically, I don't know, but I guess you might have to specify the  
> > equation on some standard form for differential equations, not in form  
> > of an integral using it's own partial result.
> 
> To solve ordinary differential equations numerically, you usually have
> to get them to a form where the derivatives are explicitly computed from
> the "current" values. For your equation, that simply means differentiating
> with respect to time so that you have 
> 
> $\frac {dQ}{dt} = \left(\frac{U-\frac{Q}{C}}{R}\right)$
> [..]

oh yes, thanks - it's also _much_ easier to read now..  ;-)

yours,
 - clifford

-- 
A: No.
Q: Should I include quotations after my reply?



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