Hi all,

I am looking for good packages in R for data-fitting including cross
validation... so that I don't have to write my own cross-validation
programs...

For your information, I have also posted more detailed description of my
problem including a few plots here:

http://stats.stackexchange.com/questions/23281/whats-the-best-way-to-fit-this-very-strange-looking-data

Could any body please shed some lights on me?

Thanks a lot!

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