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Re: Fit or Interpolate


Hi,

a interpolation gives for the data x[i], y[i] at every
point x[i] the original y[i], a fit must not do that.

Regards
  Jens

David Seruyange wrote:
> 
> 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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