I've developed a new logic math signal to complement the analog math signal. The pull request can be found at PR #42 at https://github.com/sigrokproject/pulseview. I was disappointed to not find one already available to assist in visually scanning for interesting points in a larger recording, so I refactored the analog math signal in order to add the new signal type. It's not the most efficient as it doesn't pack all of the logic math signals in one logic data object, but it's good enough for a few signals if you have a decent amount of memory. I can definitely confirm that it's quite useful for being able to set up an expression to identify interesting points in time when zoomed out and then zoom in for further analysis.
Please let me know what you think! Kyle
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