Avoid empty left hand part of plots

[yngves]

Case: I select a time interval where there is no measurement point near the beginning of that interval (i.e. the car was offline for some duration at the beginning). Then the left part of the diagram is empty, and the plots only begin somewhere towards the right. And this is even though older data ("beyond" the left edge of the diagram")exist in the database.

The two attached screenshots show how a 6 hr plot is empty for the first 2.5 hours, but when e.g. a 2 day duration is selected, the plots fill (almost) the entire diagram.

Would it be possible to add logic so that the system looks for the last data point before the chosen diagram interval and uses that to fill the diagram entirely?

[tillsteinbach]

Actually I have no idea how this could work. If there is someone with very good SQL knowledge who could give advice I would be happy to implement that