Hi, I want to fit a 3-term exponential function i.e.
y = a*exp(-b*x) + c*exp(-d*x) + e*exp(-f*x)
to get coefficients b,d,f.
Matlab's curvefitting toolbox is great for 2 term fitting, but that is it's limit. Tried log fits, polyfit fit but had no luck. Any ideas?