[CF-metadata] bounds variable & closed-open intervals

From: Karl Taylor <taylor13>
Date: Tue, 27 Mar 2018 14:45:33 -0700

Hi Erik,

If the mean is a straightforward average of the 600 per-second samples
(at 23:10:00, 23:10:01, .... 23:19:59), then this most accurately
represents (according to the "Midpoint Rule") a mean for the period
extending from 23:09:59.5 to 23:19:59.5, so those should be your bounds.

cheers,
Karl



On 3/27/18 12:41 PM, Erik Quaeghebeur wrote:
>> I think we've been thinking about this wrong.? You apparently want to
>> report the mean for the period 23:10:00 - 23:20:00 from 1-second
>> samples (sampled on the second). [?]
>> So,? your bounds should define the interval represented by the mean
>> you are reporting (23:10:00 - 23:20:00), and you should estimate that
>> mean using 601 samples, but weighting the first and last sample half
>> as much as the others.
>
> I do not compute the average and neither can I influence that. Each
> statistic is based on 600 samples. Either 23:10:00 to 23:19:59,
> labeled 23:10, or 23:10:01 to 23:20:00, labeled 23:20. So either
> closed-open or open-closed if you would use 23:10 and 23:20 as bounds.
>
>
> Best,
>
> Erik
>
Received on Tue Mar 27 2018 - 15:45:33 BST