This functions directly calls rlocus() from the control package which must be installed and loaded. In contrast to rlocus(), mouse clicks on the root locus display the related gain and all other poles resulting from this gain together with damping and frequency of conjugate complex pole pairs.
All possible interaction by mouse clicks or keys are:

Left click: Gain, damping and Frequency

Displays related gain and all resulting closed loop poles together with damping and frequency

Simulates the step response for the gain of of the most recently selected pole locations

Simulates the impulse response for the most recently selected gain

Provides the open loop bode plot for the most recently selected gain

Provides the open loop bode plot with stability margins for the most recently selected gain

Provide sall four aforementioned plots

Removes all closed loop pole markers and annotations

Removes all open figures with simulation and bode plots

Exits the interactive mode and re-activates the octave prompt

There are no output parameters.

Inputs

sys

LTI model. Must be a single-input and single-output (SISO) system.

The increment used in computing gain values.

Minimum value of k.

Maximum value of k.

Outputs

Plots the interactive root locus to the screen.
Unlike rlocus(), this function does not have any output parameters. For output parameters please directly use rlocus().

See also: rlocus

Source Code: rlocusx