Calculate xhalf from exponential fit.
Fri, 10/07/2022 - 01:03 am
I am performing fits of some data (y-value as a function of time) and I am ordinarily using the in-built Sigmoid fit function to obtain a measure of the time taken to reach the half-value of the fit (or xhalf per the Igor output naming) for a given parameter.
I cannot use the Sigmoid fit for the entire time series of my data, where the exp_Offset fit is better suited and fits the data nicely. However, I am unsure of how to modify the equation to provide an xhalf output for the exp_Offset fit as in the Sigmoid fit.
I have attached an example data set where I fit points 0 to 39 with a Sigmoid fit and points 47 to 69 with an exp_Offset fit.
Any help with calculating the half-time for this parameter would be greatly appreciated.