Good curve-fitting routine

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?