How to alter X-axis units to enable a WavevsWave plot?

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Hi Andrew,

I'm not sure we're talking exactly about the same tool. Is VIVADO the same as ViVA?

I have done the "allow any units" and as I said, it allows them to be plotted in the same window, but not to generate the Y-Y plot. Perhaps am I missing something there? abTable() will work, but for that I need to save the waveform data in a file and call it back. I would like to have the desired waveform made upon simulation finishing and be loaded in the assembler GUI. This is for the purpose of being able to keep using the corner filters defined in the simulation run.

Finally, the plotDiff() isn't much help here. Also,  I'm not familiar with the syntax you presented above. What's the AC football cases ?

Dear unskilled,

Mr. Andrew Beckett wrote a SKILL function that changes the units of the x component of a waveform to "sec". In your case, my thought is that the function ocnYvsYplot() or its ViVA equivalent relies in the x units being the same in order to create the new waveform consisting of the the two sets of y values.

If I understand your example, your two x-axis units are "m" and "ms". Hence, I might suggest your use the function abSetXUnits() written by Mr. Beckett to convert the x units of your "pm" signal to seconds prior to invoking the ocnYvsYplot() function. His function may be found at the Forum post at URL:

https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/23345/ocean-calculator-expressions-and-their-units/1313940#1313940

If you are using the Calculator to create the expression, there are some instructions in the functions to register the function in the Calculator. Then, you can enter the expression:

abSetXUnits(pm)

to change the x-axis units of "pm" to sec.

I think your resulting expression might look something like this:

ocnYvsYplot(?wavex abSetXUnits(pm) ?wavey sampled_iload_stb ?titleList '("My Y vs Y plot") ? colorList '(y1))

You can define this Calculator expression as an output and as long as you have enabled the plotting of signals following a simulation, I believe it will execute the plot.

Shawn

unSkilled said:

Finally, the plotDiff() isn't much help here. Also,  I'm not familiar with the syntax you presented above. What's the AC football cases ?

This was some nonsense post either copied and pasted from elsewhere or generated with something like ChatGPT, followed by a failed attempt to add a spam link. So you can ignore it. 

Shawn's later suggestion to use my abSetXUnits is likely to help here.The act of allowing any units for plotting doesn't fix the units themselves - it just means that ViVA tolerates plotting them on the same graph; it doesn't affect calculator functions that need waveforms with consistent units.

Andrew

unSkilled said:

Finally, the plotDiff() isn't much help here. Also,  I'm not familiar with the syntax you presented above. What's the AC football cases ?

This was some nonsense post either copied and pasted from elsewhere or generated with something like ChatGPT, followed by a failed attempt to add a spam link. So you can ignore it. 

Shawn's later suggestion to use my abSetXUnits is likely to help here.The act of allowing any units for plotting doesn't fix the units themselves - it just means that ViVA tolerates plotting them on the same graph; it doesn't affect calculator functions that need waveforms with consistent units.

Andrew