How to extract mathematical function using given graph and data in labview

[ajit107]

I have excel x and Y data ,now i want to explore the mathematical function from the data , i am attaching the data for ur reference 

[Worle]

Are you after an equation for a best fit line? If so look in the Mathematics/Fitting palette. There are VI's in there fore pretty much every type of curve fitting you want.

[altenbach]

Your excel sheet has several xy datasets and they seem to represent measured data. In order to describe the data with a mathematical function, you first need a mathematical model to approximate your spectrum (maybe a combination of several gaussian and Lorentzian peaks and a background polynomial, etc.). Do you have a theory for the data? What does it represent? How many parameters are sufficient to describe the data? Can the remaining deviations be considered noise or artifacts?

Of course there are also generic ways to approximated the data using parameters that often don't have a scientific meaning such as a polynomial of sufficient order.