Warning !

Soas is no longer maintained. You are strongly encouraged to switch to its successor, QSoas

Exponential decays

The function expd fits chronoamperometric data to y=a*exp[-x/tau]+c (adjusting a, tau and c).

The function expD does the same after having shifted the X values so that X(1)=0

The function expd1 firs to (1-c)*exp(-x/tau)+c (adjusting c and tau).

The function expd2 fits to y=a1*exp[-x/tau1]+a2*exp[-x/tau2]+c (adjusting a1, tau1, a2, tau2 and c) after having shifted the X values so that X(1)=0

The function expD2 is a variant with different guessed parameters.

The function expd3 fits to (a1)*exp(-x/tau1)+a2*exp(-x/tau2)+(1-a1-a2)

The function expd4 fits to a1*exp(-x/tau1)+a2*exp(-x/tau2)-a1-a2

Shifting the data can also be performed before fitting the data using the command shiftx



Christophe Leger 2009-02-24