@Stefan Schippers Earlier today I tried using the python script mentioned in the manual for optimization however I am unable to do that right now due to python 3 not being back compatible with python 2 code. So I am trying to back annotate the W values for the alterparam example. I saved the W values and I am also able to view it in the graph. But I cant figure out the expression for the W value in either

device_param_probe.sym

or

ngspice_get_expr.sym

. How do I live annotate from the graph? (like I can do by pressing "b" for the voltage and current values)