Trying to Plot a Complex Plane Locus

Hi Guys ,

I am new to MATLAB and want to plot a complex plane locus for a function

here I want to sweep the Value of Gm from -inf to +inf . Rest other values are constants Values are known . I want to my result to be plotted in like this Axes should be Re & Im. How can I do it?

Thanks in Advance

[Star Strider]

Use the nyquistplot function in the Control System Toolbox.

.

[Ashish Papreja]

Sir here I am not sweeping w (the freq term ) will this work in my case?