- #1

roam

- 1,271

- 12

## Homework Statement

I'm trying to make a Nyquist diagram based on experimental data obtained of the gain and phase of a high-pass RC filter which has the transfer function:

##\frac{V_{out}}{V_{in}}=\frac{R}{R+1/(j \omega C)}=\frac{1}{1-j\omega_0/\omega}##

Here are the superimposed experimental and theoretical Bode plots:

And here is the theoretical Nyquist plot I made by using the equation above with Matlab's nyquist() function:

So how can I make an experimental Nyquist plot (using the two sets of data obtained on amplitude and phase of the filter)?

## The Attempt at a Solution

Unfortunately I couldn't get any help with this problem so far and I haven't found anything relevant online.

So, I have 3 vectors containing the collected data (gain in dB, phase in degrees, frequency in Hertz). How can I plot the Nyquist diagram using the data and NOT the transfer function?

Is there a simple way that Matlab can turn my data into a Nyquist plot? Or do I need to do everything manually? If it has to be done manually, then how should I approach this?

Any explanation, sample code, or perhaps links would be greatly appreciated.

P. S. I've attached my data just in case.