Calculate Missing Values: Difference between revisions
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{{Template:WorkInProgressBanner}}{{Template:Version badge Mx}}[[Category:Cumulus MX]][[Category:Cumulus Files]][[Category:MX txt Files]][[Category:Cumulus 1]]
<div style="background: LemonChiffon;padding:5px; margin:2px;">▼
[[File:Crystal Clear info.png|40px]] This document was written for the (legacy) Cumulus 1 software. It has been updated to cover MX, but that was for a MX release that is no longer latest!▼
<big>Mark Crossley has now written a utility (download at https://github.com/cumulusmx/CreateMissing) that can update dayfile.txt.</big>▼
</div>▼
=Introduction=
If you are using the [[Highcharts_-_Historic|'''Historic Charts''']] feature introduced from release 3.9.2 - b3097 (7 December 2020), you may notice that these new charts have gaps in available data, and the dates with/without data vary depending on what is being plotted.
For these, and other reasons, this page explains various ways in which you can edit log files, (and for MX users, database tables) so all lines contain all the fields that can be calculated for the weather station you are using.
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# Current air pressure (absolute or sea-level)
By default [[Cumulus.ini_(Cumulus_1)#Read-only_parameters_in_the_Station_section|see here]], Cumulus 1 will stop processing any readings from a weather station unless the above 4 source values are being supplied and reveal they are being updated (failure is set is after a total of 6 unsuccessful consecutive attempts to read each of these).
Cumulus also expects that your weather station can provide:
* A rainfall counter (this could be annual rainfall, or count of rocker bucket gauge tips)
Although the lack of that rainfall counter source value will affect functionality, Cumulus will continue to process other source values that are available.
Some weather stations may also provide one, or more, of these other source values (not a complete definitive list):
* Air pollution measurement
There are some configuration settings [[Cumulus.ini_(Cumulus_1)#Read-Write_parameters_in_the_Station_section|here]] where you can decide whether to use a weather station supplied
===How Cumulus might transform a Source Value===
Here are all the derived spot values that Cumulus can calculate (depending on Cumulus configuration settings, and what your weather station can output):
* '''Dew point''', a weather station might output dew point temperatures, but Cumulus can calculate it from source values for outdoor temperature and outdoor humidity
** The original legacy Cumulus, and MX, use different formulae to calculate dew point, so there is a continuity break if some of your data logs were created by the original Cumulus software and some by MX.
*[[Wind_chill|'''Wind Chill''']], again this might be output by your weather station, but Cumulus can calculate it from outdoor temperature and average wind speed.
*[[Humidex|'''Canadian Humidity Index (Humidex)''']], [[Heat_index|'''USA Heat Index''']], and [[Apparent_temperature|'''Apparent Temperature''']] are not output by your weather station, but both the original Cumulus 1 and the newer Cumulus MX will derive these spot values for you (except if you are running a very old release)
==Using the '''data log''' editor provided in MX==
▲<div style="background: LemonChiffon;padding:5px; margin:2px;">
▲[[File:Crystal Clear info.png|40px]] This document was written for the (legacy) Cumulus 1 software. It has been updated to cover MX, but that was for a MX release that is no longer latest!
<big>Mark Crossley has now written a utility (download at https://github.com/cumulusmx/CreateMissing) that can update [[Standard log files]] to add missing fields.</big>
▲</div>
In the [[MX_Administrative_Interface#The_Data_Log_Viewing_and_Editing_interface|MX admin interface]] go to the '''Data Logs''' menu tab, and select the ''Data Logs'' page.
=Missing fields (or missing lines) in dayfile.txt=
Please see [[Amending dayfile]] page for full details.
<div style="background: LemonChiffon;padding:5px; margin:2px;">
[[File:Crystal Clear info.png|40px]] This document was written for the (legacy) Cumulus 1 software. It has been updated to cover MX, but that was for a MX release that is no longer latest!
▲<big>Mark Crossley has now written a utility (download at https://github.com/cumulusmx/CreateMissing) that can update dayfile.txt using [[Standard log files]] as source.</big>
</div>
==Missing or Corrupted lines==
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