# Cole-cole plot curve collapses when trying to alter the valule of horisontal axis

I am a beginner and trying to simulate a cole-cole plot of a simple parallel circuit having two R, one coil and a capacitor. Image attaced, LTspice version is XVII, pc is windows7.

I've read this Q-A;[Bode plot graph: Frequency vs. Angular frequency] Bode plot graph: Frequency vs. Angular frequency but things does not seem to be the same.

When I checked out the current for R1, the graph goes well. So altered this curve from R2 to 1V/I(R2) as shown in this image in the upper left.

Then altered the vertical values; 85dB to -85dB, with the tick 5db, and clicked Nyquist. This seems works goo.

But when I alter the horizontal value; o.oohms - 1Mohms, the curve collapses.

Any tips will be very much appreciated, thanks!

p.s.; Incidentally I tried turned off [Autoranging], but the results was the same...

• As I understand it , Cole-Cole plots are for phaser dielectric properties in the microwave band to establish a model from data, not discrete parts <1Hz ameteksi.com/products/software/zsimpwin – Tony Stewart Sunnyskyguy EE75 Aug 15 '18 at 3:02
• Welcome to EE.SE. Can you ask a specific answarable question? – winny Aug 15 '18 at 6:50

LTspice doesn't have ohms, farads, etc, in the schematic editor, all it has is units, and they are case insensitive. That is, m stands for milli (1e-3), and so does M. So what you have is a step from 1 to 1e-3. So do not bother adding ohm, it has no effect, you can just write .ac oct 50 1 1meg.
Also, LTspiceXVII orders the stepped values in increasing order, but I don't know if this also applies to .AC directives.