I have same experimental data with same noise:
I have to calculate the derivative and the integral of the function that fit the experimental data. I try with all the function in this page but the result was not good. How can I do that?
Update: I look for same method to interpolate the data in order to calculate the derivative and the integral of the "best fit function" (because data have same noise I can't compute directly the derivative of them). The problem refers to the fact that I can't find a function that fits "exactly" the data; I try with a combination of sine and cosine and other method but the result don't work well.
I read the Cross Validate guidelines and I think my question is more related to this site, but I can't migrate the question to it.