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uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
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#11
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#12
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So we seem set on 'the throw to the odd' for sorting a MONTHLY mean - but what about seasonal and YEARLY means?
For a Yearly mean would you use A - the mean min + mean max divide by 2 and apply the throw to the odd rule, or B - the sum of the 12 monthly means divide by 12 and then apply the throw to the odd? |
#13
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#14
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"Norman" wrote in message ...
In practice, I suspect that in most cases you would end up with the same answer using either method. Hi, Norman, Agreed, even MetO site thermometers are only accurate to +-0.2C so I can not see the point of such worry about accuracy with means! Just throw to the odd for goodness sake, I've been doing it for over 40 years. It ain't that difficult! As Graham said, it's all about the values around 0C. Ken Copley Teesdale |
#15
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I'm sure that accuracy is important and obviously it can make a difference of 0.1c
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#16
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On Sunday, 30 December 2012 10:42:35 UTC, wrote:
I'm sure that accuracy is important and obviously it can make a difference of 0.1c Also, dependent depending on A or B you do get a different answer and the years that one changes, the other won't. |
#17
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wrote in message
... I'm sure that accuracy is important and obviously it can make a difference of 0.1c But the best thermometers don't work to that accuracy, far from it. Nor do the screens. Nor do the exposures, even for MetO sites. I think the difference of throwing to the odd or even is lost among other factors but I'll say no more and continue to throw to the odd as the good old MetO has told me to. Ken |
#18
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The "different" behaviour occurs at the mid-point between 10ths i.e.
10.05, 10.15, 10.25, etc. This is where "throwing to the odd occurs (if you are measuring to the nearest 10th). I can't remember either what the "name" of this rounding is It is called "rounding half to odd", not surprisingly! See http://en.wikipedia.org/wiki/Rounding#Round_half_to_odd -- Freddie Bayston Hill Shropshire 102m AMSL http://www.hosiene.co.uk/weather/ https://twitter.com/#!/BaystonHillWx for hourly reports |
#19
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Thanks for all the replies !!!
Appeared to have sparked a little interest in the subject best wishes for the new year Paul C |
#20
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On 31/12/2012 09:36, Paul Crabtree wrote:
Thanks for all the replies !!! Appeared to have sparked a little interest in the subject best wishes for the new year Paul C You would have to create a UDF to allow you access to the VBA macro implementation or roll your own very clumsy implementation via a string intermediate stage. More details about Excel rounding online at: http://support.microsoft.com/kb/196652 It still isn't pretty since you will have to add and subtract 1 in the LSB to get weathermens rounding as opposed to bankers rounding. -- Regards, Martin Brown |
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