Before you say “duh, because the data is outside of your date range”…
I have this trend below, displaying raw data:
Note no data shown at the start for both pens.
If I extend the chart to 2 minutes before, this happens:
I feel I know the reason for why this data is missing, as within the given date range these data points don’t exist. However I don’t think that’s a valid reason not to show the pen trend extended to the edge of the chart, at the value it is at the first data value before the date range, and the last value shown at the end of the date range.
The only option I see to fix this is to force all pens to trend their values at least every 5mins, but then the trend tables will become significantly larger and less efficient to return… As otherwise if an operator zooms in, the chart is pretty useless, especially for values that don’t change every second.
Example: This is zoomed in on the same trend, when the red line is a constant value for a while, with data points outside of the zoomed range, so the red line just isn’t shown at all…