[R] fitting simple y(x) data

[Ben Bolker]

  This is definitely nonlinear.  nls() is what you need.

  

On Sat, 2 Nov 2002, Timur Elzhov wrote:

> Dear R experts!
> 
> I have the y(x) data (length(y) == length(x) == 10,000)
> and I want to fit it with function
> 
>   exp(-a1 * x) + exp(-a2 * x)
> 
> a1, a2 -- are parameters to be estimated.
> 
> What the "right" way to do it?
> Can I transform data to something so that linear model could be used?
> Or, I must use a non-linear model, definitely?
> 
> Thank you very much.
> 
> 
> --
> WBR,
> Timur.
> 
> 
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