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MathGroup Archive 2003

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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


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