Question: Fitting numerical solutions of ord. diff. equ.

*To*: mathgroup at smc.vnet.net*Subject*: [mg23365] Question: Fitting numerical solutions of ord. diff. equ.*From*: Marc Datz <datz at ise.fhg.de>*Date*: Thu, 4 May 2000 02:59:32 -0400 (EDT)*Organization*: Fraunhofer ISE*Sender*: owner-wri-mathgroup at wolfram.com

Hi, for my diploma thesis I have to optimize the parameters of a only numerical solvable System of ordinary differential equations, so that it fits optimal to my measured curve. I have 6 implicit ordinary differential eqautions with derivatives to time which I have to solve numerically. The parameters of the equations have to be optimized in a way, that the chi^2 value of the calculated NF(t) and my measured data is minimized (see atached File). [get the file by contacting the author ---moderator] I work on a solution in Pascal, but I heard it would be easy to solve this problem with Mathematica. Unfortunately I dont know anybody who could help me. The advantage would be that I could get the standard errors of the parameters (alpha, beta...) and see very fast which are significant. I never worked with Mathematica before and I want to know, how I have to proceed and how much time you think it will take. Many thanks Marc