index="muni" | nbclosest | timechart span=30m dc(vehicle_id) as NumVehicles
(where nbclosest is a custom search command that filters results and isn't relevant to this question) it correctly charts the data, but the problem the data is only from a subset of hours in the day, e.g., 10am to 7pm. When plotting it, it looks like the attached image:
I'd like to change the chart so that the times outside 10am-7pm aren't displayed at all. It would be as if the chart were squished horizontally by removing midnight-10am and 7pm-midnight.