Hello,
I have been using the excellent Belchertown skin (Thank you Pat!) for my
Weewx system and I'd like to know if it's possible to add a trend line, or
an average line, to some graphs.
Specifically, I'm looking to add this to my soil temperature graph. I have
attempted to do so, but have not yet been successful.
I have added the following to my graphs.conf file:
[[SoilTemp]]
title = Soil Temp
[[[soilTemp1]]]
name = Soil Temperature
type = spline
[[[soilTemp_avg]]]
name = Soil Temp Average
observation_type = soilTemp1
aggregate_type = avg
average_type = avg
type = spline
time_length = week
aggregate_interval = 86400
xAxis_groupby = day
The output varies, but it's never right. And, I assume it's calculated each
day at midnight? For example, it looks like this today:
[image: SoilTemp.png]
What am I missing here? The graph being wrong is one thing, but this
partial line just makes no sense to me. :) Can someone shed some light here?
Much appreciated!
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