Fit or Interpolate

*To*: mathgroup at smc.vnet.net*Subject*: [mg39200] Fit or Interpolate*From*: sophtwarez at hotmail.com (David Seruyange)*Date*: Mon, 3 Feb 2003 01:10:16 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Hello all, Another in a series of potentially simple questions: What is the difference between using Fit and Interpolation? f[x_]=Fit[data, {1,x},x] -or- f[x_]=Interpolation[data][x] I do know that Fit can take arguments for the independant variables form like: f[x_]=Fit[data, {1,x},x] f[x_]=Fit[data, {1,x,x^2},x] but that's a bit of guesswork if you have a limited set of points, no? Also, is there a function in Mathematica that allows me to swap dependent and independent variables? e.g. x=2.5y --> y=x/2.5 Thanks much, David Seruyange Student