Power spectrum of multiple signals

[Jack_W]

Dear all,

I usually plot a power spectrum is the way shown in the example attached. This works perfectly fine for me until now.

Now I want to plot 2 spectra of 2 different signals on the same graph and I cannot figure it out. 

Also, I would like plot a line in my log plot in the same graph.

Any hint is apprciated.

Thank you.

[GerdW]

Hi Jack,

right now you plot one ("1") waveform in your waveform graph.

You would like to plot 2 waveforms (aka "spectra") in your waveform graph. And additionally you want to plot a line, which makes for a 3rd waveform.

What about using an array of waveforms to plot more than just one waveform? In your case that array should consist of 3 elements (aka waveforms)…

Btw. there is a context help for graphs and there are also example VIs for graphs…