get the difference between two wave forms after parametric sweep.

Svilen,

Almost certainly this could be done with an expression using the eval type set to “sweeps”, but could you please share the expressions used and what you are sweeping too - it’s hard to be certain precisely what you are doing and I’d like to make sure that any specific suggestion I make has been tested and is close to what you actually need.

Maybe also sharing a screenshot of the results you get in ADE and then showing which you want to get the difference between?

Thanks,

Andrew

Hi Andrew,

Thanks for replying.

I did try to attach an image yesterday but it didn't allow me. So I had to describe it in words which I'll do again, hopefully in a better way.
I am running a parametric sweep on a variable called "bits" which controls the delay of my clock. I am sweeping it over a list of non-uniform values, something like 0 1 3 7 15 31 etc. I have also created another variable ind (for index) that's uniform, 1 2 3 4 5 6 etc. It doesn't control anything in the circuit but I grouped it in a parametric set with the first one  just to have a uniform index to plot against.
The output I monitor is VT("/out") and the reference with respect to which I want to plot is defined as expression ref = value(VT("/out") "bits" 0)
I have defined family = VT("/out") for the family of plots from the sweep.
Then I define the delay from the reference 2nd rising edge to the 2nd rising edges of any of the clocks in the family del=delay(ref 0.4 2 "rising" family 0.4 2 "rising") 
And just for the sake of it, I've also defined an expression for index=VAR("ind")
All those are set as evalType sweeps.

From the calculator I plot waveVsWave(?x index ?y del), also rshift(waveVsWave(?x index ?y del) 1). Now I have two plots for the delay and the delay shifted by one count of index with respect to each other. The idea was to take the difference between the two and thus have the delay between each two consecutive edges of my clock as I perform the sweep. But that difference returns 0.

Since I couldn't upload an image here, I uploaded it to https://archive.org/details/sweep_20260226

Regards
Svilen

Hi Andrew,

Thanks for replying.

I did try to attach an image yesterday but it didn't allow me. So I had to describe it in words which I'll do again, hopefully in a better way.
I am running a parametric sweep on a variable called "bits" which controls the delay of my clock. I am sweeping it over a list of non-uniform values, something like 0 1 3 7 15 31 etc. I have also created another variable ind (for index) that's uniform, 1 2 3 4 5 6 etc. It doesn't control anything in the circuit but I grouped it in a parametric set with the first one  just to have a uniform index to plot against.
The output I monitor is VT("/out") and the reference with respect to which I want to plot is defined as expression ref = value(VT("/out") "bits" 0)
I have defined family = VT("/out") for the family of plots from the sweep.
Then I define the delay from the reference 2nd rising edge to the 2nd rising edges of any of the clocks in the family del=delay(ref 0.4 2 "rising" family 0.4 2 "rising") 
And just for the sake of it, I've also defined an expression for index=VAR("ind")
All those are set as evalType sweeps.

From the calculator I plot waveVsWave(?x index ?y del), also rshift(waveVsWave(?x index ?y del) 1). Now I have two plots for the delay and the delay shifted by one count of index with respect to each other. The idea was to take the difference between the two and thus have the delay between each two consecutive edges of my clock as I perform the sweep. But that difference returns 0.

Since I couldn't upload an image here, I uploaded it to https://archive.org/details/sweep_20260226

Regards
Svilen