The above regex which I gave is to extract fields. Once the fields are extracted then you can use them i your commands.
Now coming to visulaizations. Visualizations can only be created depending on how you end your search, for example :
if you end your search with timechart command then you will immediately have visualization options for line, bar etch. Example:
yourBaseSearch | timechart count by yourField
If you have statistics being generated as aggregations like min, max, sum etc you can plot them using timechart, chart etc.
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