I tried the method suggested by you. I have used four MOSes in my circuit.
So, I included all four MOSes in .scs file to save the Vth.
Here are some of the observations and queries:
1. When I do Transient analysis, I opened the results browser -> tran-tran . I found only two MOSes in that list. But when I click Vth, it plotted Vth vs time.
2. I want to plot between Vth and W or L or Vth and aspect ratio (W/L) and so I chose ac analysis by sweeping variable 'w' (width of Tr). To my great surpise , I found none of the transistor list in Results Browser -> ac-ac.
Do I need to do anthing more in order to plot Vth vs W, Vth vs L and Vth vs W/L?
If so, what should be done?
Thanks in advance.