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Blank window when trying Y vs Y or waveWave() for plotting.

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Hi all,

I have these two wave forms that I want to plot against each, for that I tried using Y vs Y in the plot window and also from the calculator, but both show a blank screen instead of the plot, when I express them in table I can see all the values but for some reason cannot see the plot for it, I am using virtuoso 6.1.8-64b and ADE L for simulation.

  • Normally there's a message in the CIW indicating what the problem is. What do you get there?

  • I created a simple testcase with the same names, and carefully extracted your expressions from the images (it's always best if  you share complex expressions as text; it was also not immediately obvious that you were using a parametric analysis in ADE).

    Anyway, the issue is that your x-axis expression:

    rms(vh('pss "/net1" '(0)))*rms(vh('pss "/net1" '(0)))*10e-6

    is actually complex - each value is a complex number (this is because vh and ih return complex numbers, and all the rms function is doing here is dividing the values by sqrt(2)). The waveVsWave function can cope with complex x-axes, but these can't be plotted - which is the problem you saw. The answer is to take the magnitude of your x-axis expression:

    waveVsWave(?x mag(rms(vh('pss "/net1" '(0)))*rms(vh('pss "/net1" '(0)))*10e-6) ?y real(rms(ih('pss "/V1/PLUS" '(1)))*rms(vh('pss "/net3" '(1)))) + real(rms(ih('pss "/V0/PLUS" '(1)))*rms(vh('pss "/net7" '(1)))))

    Andrew

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