[R-sig-dyn-mod] deSolve ODE, interpretation/defintion of result parameter

[Thomas Petzoldt]

Hello,

the original poster sent me a message, that we wants to cancel his post:

Am 27.08.2024 um 16:40 schrieb Armin Boehrer:
> Hello,
> I found out, that it was a misinterpretation of the result from my side:
> The program code is correct.
> The result is correct.
> The result should be interpreted as k as the numeric value indicates.
  [...]
> Best wishes
> Armin Boehrer


Thomas Petzoldt
(moderator)



Am 19.08.2024 um 07:24 schrieb Armin Boehrer:
> Hello,
>   
> I wanted to start using ODE in deResolve.
> I thought an own simple example would be best to learn:
>   
> The ODE solving for an exponential  y = a * exp(k*x)
> and its derivative dy/dx = a*k * exp(k*x)
> should be easy:
>      Just define    dy <- ak_fit * y
>      Run code, see blow,
>      and it works!
>   
> What I wonder/My question:
> I expected to get the result ak_fit as the product of my input parameters a and k,
> but I see that I get just the decay-constant k.
> If I had not known the result, I would have misinterprested the result.
>   
> Can you help? What is wrong with my naive interpretation?
> Thanks and best wishes,
> Armin Böhrer
>     
  [...]