Return the negative of a system.

Parameters:sys: StateSpace, TransferFunction or FRD
Returns:out: StateSpace or TransferFunction


This function is a wrapper for the __neg__ function in the StateSpace and TransferFunction classes. The output type is the same as the input type.

If both systems have a defined timebase (dt = 0 for continuous time, dt > 0 for discrete time), then the timebase for both systems must match. If only one of the system has a timebase, the return timebase will be set to match it.


>>> sys2 = negate(sys1) # Same as sys2 = -sys1.