I am trying to find the input impedance \$R_{in}\$ for the circuit given below using a 1 kHz sinusoidal source.
I want to plot the input impedance on the y-axis and the parameter \$R_{2}\$ on the x-axis.
However, when I run the simulation I get a set of graphs corresponding to different values of \$R_{2}\$ with time on the x-axis.
How can I get the graph for variation of input impedance with respect to \$R_{2}\$?