General Form:
save [all | allv | alli | output ...] .save [all | allv | alli | output ...]
Save a set of outputs, discarding the rest. If a node has been mentioned in a save command, it appears in the working plot after a run has completed, or in the rawfile if ngspice is run in batch mode. If a node is traced or plotted (see below) it is also saved. For backward compatibility, if there are no save commands given, all outputs are saved.
When the keyword "all" or the keyword "allv", appears in the save command, all node voltages, voltage source currents and inductor currents are saved in addition to any other values listed. If the keyword "alli" appears in the save command, all devices currents are saved.
Note: the current implementation saves only the currents of devices which have internal nodes, i.e. MOSFETs with non zero RD and RS; BJTs with non-zero RC, RB and RE; DIODEs with non-zero RS; etc. Resistor and capacitor currents are not saved with this option. These deficiencies will be addressed in a later revision.