Interpreting tau or invtau for exponential fits
Tue, 10/12/2021 - 08:41 am
We are doing automated fitting of a series of traces using built-in functions (either exp_Xoffset or dblexp_Xoffset). We have run into an issue where it seems the time constant is given as Tau for some traces and sometimes as InvTau. Our code simply reads the appropriate coefficient and we need to interpret whether it is tau or invtau for the next stage of analysis. My questions are:
- How can I tell the difference (programmatically)? Perhaps parse the text of the wave note of the generated fit wave?
- What causes Igor to report tau vs invtau? Is it a poor fit that gives tau?