Prior to executing "Analysis", enter the relevant data into "Experiment" and save. Then adapt the initial number of datapoints used for computation of linear regression.

Calculation summary:

The parameters for the relationship ln(x)=f(t) are estimated as follows:
A straight line is fitted to a subset of paired datapoints by means of linear regression. Additional data are included in the initial subset and computations of slope are performed repeatedly until its value is > 95 % of the maximum slope determined for the initial subset.
This method was adopted from the R-package by Petzold (2017) and originally published by Hall et al. (2015).