Tricky problems turn up if anyone uses the human calendar for accurate computations involving earth, the matter of the scatter in the calendar timing of the actual position of the earth in it’s orbit.
A nice little warning “Beware of leap year when predicting climate change, warns researcher” from the Stanford News Service March 2001
While I was researching the Science study, I realized that a lot of these phenological surveys of spring events were based on the calendar date rather than on their timing relative to the vernal equinox,” Sagarin says.
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This is in insidious problem reaching into many more fields. Post here is because I was reminded the hard way when trying to use conventional math as cross check evidence: I’m expecting screams of dissent when a future blog article is published.
Figure 1 is an XY plot and ideally is a 45 degree straight line. Whilst this is close I would prefer it better. X comes from a model and Y directly from the dataset except for this darn problem. Eye of the needle is something else, no idea what.
I have seen errors in datasets from precisely this cause.
Managed to get some sleep last night and kind of wake up today. Nicely today here in England it was less cold, weak sunshine, no rain and less wind. Forecast for tomorrow is… rain and colder.
Couple of days was in a large store looking for what they didn’t have, story of my life. I amused to notice stacked high up almost out of sight were snow shovels and toboggans. Typical shopkeepers, didn’t see snow coming, panicked and overordered at silly prices, proffered at you-must-be-kidding tags, now they have dead stock. EU? Bet they have sell-by dates on them. (saw a plastic wrapped toilet seat being sold cheap, sell by date close!) I tell you, it’s all poo. Maybe someone needs a poke fun web site collecting the daft things which time expire.
Another was a clock but that is funny. Inspector to shopkeeper: This clock is out of time, do you have anything to say?
Psst… “The fire’s tomorrow”, an old solution to old stock.
Posted Tim Channon