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Correcting Extremes: Difference between revisions
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# The links in fourth column leads you to more information about the web tags associated with that period, you can incorporate those in your own [[Customised_templates|templates]].
==How editing accuracy depends on source selected==
The editors built into Cumulus, for long term extremes (over a period of a month or more), give you the ability to display, for each extreme record:
# The figure taken from a search for that extreme by examining all entries in the [[dayfile.txt]] for that period
# The figure taken from a search for that extreme by examining all entries in the [[Standard log files]] for that period
Normally the first returns the more accurate result (unless the '''dayfile.txt''' line, either was created with a rogue value, or has been corrupted). Let me explain why:
** That means the [[Monthly log files]] do not capture any extremes recorded in the time (by default 599 seconds) between logs
** Therefore the detailed log files are not normally the most accurate source
** Please note, this less accurate way of deducing daily extremes/totals (to update dayfile.txt) is used by the [[Calculate_Missing_Values#CreateMissing.exe|CreateMissing.exe]] utility (that is only available for MX).
* Using [[dayfile.txt]] as source for recalculating past extremes
** MX typically processes data from your weather station every second (even if you use a weather station type that only reads its sensors every 40 or 60 seconds). Cumulus 1 processes data from your weather station at intervals that vary for the different station types, but we can assume it is at least every 60 seconds.
** Therefore extremes recorded in '''today.ini''' (and from there into '''dayfile.ini'') are based on the full sampling done by Cumulus
** This means none, or very few, extremes are missed
** In March 2021, a new utility '''Create Records''' was planned (for use with MX only), as at July 2021 no progress has been made in coding it. It appears that this utility will read '''dayfile.txt''' and use the more accurate daily extremes it finds there, as a basis for updating longer term extremes in the other [[:Category:Ini Files|files like monthly-all-time and all-time]]. ''<big>Perhaps you my reader can be the contributor who updates this if the proposed utility becomes available</big>''.
However, if you either have had an electrical supply problem or there has been corruption of data within your weather station generating a rogue value, it is possible that the files currently being used by Cumulus get corrupted. Provided you act, as soon as possible afterwards, [[Calculate_Missing_Values#Reading_archive_data|you can make use]] of the [[Backup folder|backups]] that Cumulus takes. All the extreme record files mentioned in the table above are backed up when Cumulus is restarted and (depending on which release you are using - see [[today.ini]]) - either
For all-time (and for MX only, monthly-all-time) extreme records, there is a log [[Alltimelog.txt]] (and for MX only,[[Monthlyalltimelog.txt]]) that logs each time the extreme is updated, so you can get an accurate previous value from there.
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