Just out of curiosity - is there a specific reason for plotting windspeed/wind gust together with pressure? Windspeed is a factor of pressure difference between two points rather than the varying pressure at a single point, and the pressure difference is often a result of temperature differentials. Not sure I can see what benefit can be obtained from plotting windspeed against a single varying pressure without also having the other contributing pressure points simultaneously plotted.
Maybe I am just being my usual obnoxious pedantic self, and spouting drivel ...... but then again .... maybe not ..... On Monday, 17 April 2017 03:33:58 UTC+3, Alec Bennett wrote: > I need to plot wind speed, wind gust and barometric pressure on a single > graph. The problem is that they have such different yscales that > differences in barometric pressure aren't visible. > > For example, see the attached chart, which shows the wind ranging from > about 5 to 15 mph, and the barometric pressure ranging from about 30.15 to > 30.2 inHG. When those ranges are plotted together the barometeric pressure > appears as a straight line. > > I've been playing with editing genplot.py to produce a transparent plot of > just the barometric pressure and then pasting it over a plot of the wind > graph, but thinking there must be an easier way. I don't imagine anyone has > any ideas? Ugly hacks are invited. > > And note that I don't need to add any Y axis labels for the barometer, > it's enough just to plot the line. And I don't need auto yscale ranging, > I'll just set it to the min and max pressures on record for the area (28.8 > and 30.6). > > > > > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
