Advanced fitting to analytical functions

Is there a more advanced version of polyfit, that also automatically fits to other non-polynomial functions (exp, log, trigonometric, non-integer powers) and combinations thereof?

e.g. if i had some (moderately) noisy data following a sqrt curve, this code would detect that and spit out an sqrt(x) type of formula

Answer 1

[Iain]

"fit" will try to fit specified functions. - You'll need to play around with it.

There's a 3rd party thing called Eureqa that may be more suited to finding functions that closely represent your data, whatever it is.

[Peter]

just tried it. works quite nicely!