At the end of an analog or mixed-mode circuit simulations, the node voltages, branch currents and device powers are typically available for graphing or tabulation. Voltages, current and powers are usually plotted as a function of time or frequency. In the case of a Network Analysis test, port characteristics like scattering, impedance or admittance [[parameters]] are also computed. At the end of a digital circuit simulation, it is the state of the digital inputs and outputs that you would like to visualize.
==Setting Up Circuit Observables==
Even though all the circuit voltages currents are computed during a simulation, they are not automatically plotted for the obvious reason of avoiding congested and confusing graphs or enormous data tables. Therefore, you have to specify which circuit observables you would like to display at the end of a simulation.
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