freddie wrote: ↑Mon 27 Nov 2023 10:00 pm
It's a delta plot superimposed on a running total. This causes scale issues as totals grow. If you plot the pure delta about the origin line as I suggested then scale doesn't really come in to it - unless, of course, if the delta itself becomes large.
In reading charts scaling is of the essence. If you look at my second example - the area's coloured - you see that 2022 has a very small period of drought, 2020 a large one and the other two years none. I don't think plotting only the difference between rain and EVT would supply the info my way of charting does. The initial zoom level (1 year) is no coincidence: it shows a period over which the relation charted has its periodic importance and beside that: the Y-axis scale shows the relative importance of a possible dry period and will always more or less be the same.
So in short: you would like the opposite of what is intentional and what I see as important and has been deliberately avoided.
NOTE: in the first chart when starting the CUtils website it by default - it can be changed/removed by the user - shows the overview chart and you may have noticed that the pressure scale also deviates from what is normal in the CMX world: the scale has a memory for the max/min pressure records that station has ever seen and large barometer changes will show better and in context. As such with a longer period high pressure - e.g. 1020 hPa - the pressure line remains almost flat and hardly moves. CMX pressure will then start to have large amplitudes for small changes because the scale will fall back to e.g. 1020 +/- 5 hPa. I think my barometer is better
So in short: I assume we can agree to differ of opinion on how to graph and how to scale.