Would someone else mind taking a look at this and confirm whether this
might be the case, or whether I'm just losing my mind?
Looks like you are right from my end art... I even tried what ryan may
said about autoscaling and set your
dataset = Dataset(filename,'r')
dataset.set_auto_scale(False)
for those who wish to compare here
http://modelweather.com/files/patrick/pearson/
-- is a copy of Arthur's python script - pearson.py.txt
-- the output from running on my system - plot.png
-- the output from scaling adjustment - plot2.png
-- the raw aws s3 file used.
the outputs are the same as pete pokrandt's fyi :)
----
Patrick L. Francis
AerisWeather
http://modelweather.com/
https://www.facebook.com/wxprofessor