I have a good amount of events from a user undefined. How can I explicitly filter for this value?
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Michael from Mixpanel here- welcome to the community!
I would recommend something like what @toddg has.
For more background, undefined properties usually happen when the property you are segmenting by isn’t on the events you’re looking at. For more possible reasons that we see, look here.
In order to see only events that have this Name property undefined, I would click on the arrow I've marked in green below and then switch the filter operator from contains to is not set.
If you have tried this unsuccessfully, what are you seeing?