Reliable Curve-Fitting Routine in C/C++ | Get Expert Advice

[james4321]

I am looking for a reliable curve fitting routine (preferrably in C or C++). Currently I use Levenberg-Marquardt routine from numerical recipes but it fails frequently. Your adivce will be appreciated.

 

[Dr Transport]

your choice of fitting parameters in the Levenberg-Marquardt routine needs to be changed, usually that is one of the most robust methodologies out there.

 

[Pythagorean]

Use a genetic algorithm method to find the optimal Levenberg parameters?

 

[james4321]

Thank you Dr Transport and Pythagorean for you reply.

"your choice of fitting parameters in the Levenberg-Marquardt routine needs to be changed"
I do this but some data are very difficult to fit even with this.

"Use a genetic algorithm method to find the optimal Levenberg parameters?"
Unfortunately I have no expertise in genetic algorithms. I wish I know how to use these algorithms as they are very useful. Do you recommend any code or package that can do this with little experience?

 

[james4321]

Thank you Dr Transport for you reply.

"your choice of fitting parameters in the Levenberg-Marquardt routine needs to be changed"
I do this but some data are very difficult to fit even with this.

 

[james4321]

Thank you Pythagorean for you reply.

"Use a genetic algorithm method to find the optimal Levenberg parameters?"
Unfortunately I have no expertise in genetic algorithms. I wish I know how to use these algorithms as they are very useful. Do you recommend any code or package that can do this with little experience?