control.matlab.nyquist

control.matlab.nyquist(syslist[, omega])

Nyquist plot of the frequency response.

Plots a Nyquist plot for the system over a (optional) frequency range.

Parameters:

syslistlist of LTI

List of linear input/output systems (single system is OK).

omegaarray_like

Set of frequencies to be evaluated, in rad/sec.

omega_limitsarray_like of two values

Set limits for plotted frequency range. If Hz=True the limits are in Hz otherwise in rad/s. Specifying omega as a list of two elements is equivalent to providing omega_limits.

plotbool

If False, do not generate a plot.

Returns:

realndarray (or list of ndarray if len(syslist) > 1))

Real part of the frequency response array.

imagndarray (or list of ndarray if len(syslist) > 1))

Imaginary part of the frequency response array.

omegandarray (or list of ndarray if len(syslist) > 1))

Frequencies in rad/s.