[R] fitting simple y(x) data

[Timur Elzhov]

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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