@Belal Ali

.options savecurrents

before the .tran or .dc line

but for gm and caps ? another question i want to store the op params like gm and caps as an output from a dc sweep, because this write command only out the node voltages and currents. @Stefan Schippers

@Belal Ali gm, vth, capacitances and other stuff must be saved explicitly with a save / .save command.

@Stefan Schippers ok, after saving, how to out them in the dc sweep result ? printing the value of gm with Vgs sweep

you can do a .print "@m.........[gm]"

print only prints the op of the device, not the sweep

@Belal Ali This is a limitation of ngspice.