miro_ilias
New Member
- Joined
- Feb 25, 2013
- Messages
- 1
Dear Sirs,
let me please allow to write this post here, though it's related to the XNumbers library. The reason I am writing here is missing discussion forum about XNumbers (and no response from the email at XNumbers web-page).
I hope to find someone who has experience with this marvelous numerical library. I am university teacher, and XNumbers is great help for teaching the numerical math.
In this directory I have the testing Excel file (xlsm), the XN.xlam addin and 2 pdf files which are sheet printouts.
The problem is in the strange sensitivity of XN addin functions for calculating ODE to cell contents containing description.
1. When I use "y" in the descriptive cell, the ODE_RK4/ODE_PC4 numerical results are OK. See the pdf-printout.
2. However, switching to y(x) or y{x} or other y=f(x) / y-x string dependence the calculated ODE numerical results are wrong. See this pdf-printout.
I do not have capacity to dig through the XN.xlam macro, maybe I get help here.
Yours, Miro
let me please allow to write this post here, though it's related to the XNumbers library. The reason I am writing here is missing discussion forum about XNumbers (and no response from the email at XNumbers web-page).
I hope to find someone who has experience with this marvelous numerical library. I am university teacher, and XNumbers is great help for teaching the numerical math.
In this directory I have the testing Excel file (xlsm), the XN.xlam addin and 2 pdf files which are sheet printouts.
The problem is in the strange sensitivity of XN addin functions for calculating ODE to cell contents containing description.
1. When I use "y" in the descriptive cell, the ODE_RK4/ODE_PC4 numerical results are OK. See the pdf-printout.
2. However, switching to y(x) or y{x} or other y=f(x) / y-x string dependence the calculated ODE numerical results are wrong. See this pdf-printout.
I do not have capacity to dig through the XN.xlam macro, maybe I get help here.
Yours, Miro
