[Help-gsl] Fitting biexponential decay

[Totte Karlsson]

Hi,

I used gsl for fitting of a single exponential decay data. I found how to do
that in one of the examples and it works really great!

 

Now I need to find a fitter for a bi exponential decay function, i.e. 

 

y(t) = A1exp{-lambda_1*t} + A2exp{-lambda_2*t}.

 

In the equation, the A1 and A2 will typically be equal ,(A1 == A2) and
initially set to 1, so thefit will be for lambda_1 and lambda_2.

 

Anyone who have some ideas how to start on this, or where to find some
example/working code? Any hints are appreciated.

 

 

Thanks!

 

-totte