Experimental data as function?

*To*: mathgroup at smc.vnet.net*Subject*: [mg25755] Experimental data as function?*From*: Eric Sommer <erso at hrem.mpi-stuttgart.mpg.de>*Date*: Sat, 21 Oct 2000 14:43:05 -0400 (EDT)*Organization*: GWDG, Goettingen*Sender*: owner-wri-mathgroup at wolfram.com

Hi, I have measured an experimental curve and the data are available as (x,y=f(x)) ASCII data pairs. I would like to use this curve as a function that I can insert, for example, in calculations, or that I can integrate. It should work in the way that for a given x, the measured y value will be taken. I found methods to import data as lists, but could not find any hint to use them as a function. Is there a possibility to create such a function with Mathematica? How can it be done? What will happen, e.g. for an integration, when x values appear that were not measured? Thank you, Eric Sommer