I’ve just made a small improvement to the atmospheric pressure graphs displaying information from our weather station.
The shorter period graphs were often having their y-axis auto scaled from 1,000 – 1,200 millibar. This wasn’t very helpful when the pressure was varying by only small values just above the 1,000 millibar mark (as isn’t uncommon on the 24 hour graphs) — it left a lot of empty graph space at the top. The change forces the graph to display the fixed range of 900 – 1,100. This places 1,000 millibar in the centre of the plot, making these small variations much clearer.