Exp, dbexp and dbexp_XOffset fits, exponential decay
Mon, 04/26/2021 - 10:54 pm
I’m using the exponential curve fitting which work nicely with my data. I have two questions:
1. I nornalized the data and I was expecting to get y0= 1 since I start the fit at 1(using cursors), but this is not the case (see figures). I went to Analysis-> Curve fitting -> Coefficients and I forced y0= 1 by clicking on hold and make initial guess = 1. In the tab Data options I clicked on "Cursors" (as this is the range fit I'm interested), but the fit I get has no sense, it keeps the fit in 1 (see last figure). How can I do this fitting properly?
2. I want to compare several of these curves. I get nice fits using exp, dbexp or dbexp_XOffset fit. Since I'm interested in the decay, which fit would make more sense to use?