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Standard log files: Difference between revisions
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→Manipulation outside Cumulus: add MX rules
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Edit the original file using an editor that treats all fields as text [use either any text editor, a Comma Separated Value editor, or a spreadsheet program that can be instructed ''not'' to recognise special field (like date and time) types]. [[File:Open office (editing cumulus log files).png | left]] If you wish to use "Calc" in 'Apache Open Office', "Libre Office", or similar, select the field separator you use (in this illustration comma is selected, but your file might use semi-colons between fields, don't select commas if your real numbers use comma between integer and decimal parts) and leave "Detect Special Numbers" unselected (as normal default for this software). Best not to use 'Microsoft Excel' as that normally has opposite default, and may change without any warning the format of all dates so Cumulus can no longer recognise the first two fields:
*Each line must contain the fields in correct sequence (since new versions/builds can add to number of fields, Cumulus will accept different months having various row lengths i.e. older ones without the more recent fields at the end).
* The date format uses two digits for the year and should be treated as text. For software (e.g. Excel) with default of recognising formats, ensure that such recognition is turned off, as it is likely to change the dates to either a number representing days since e.g. 31 Dec 1899, or to have four figure years, and then Cumulus will no longer be able to use the log file. (Also the month must be the middle figure, USA convention cannot apply within ''Log_Files'').
*Nulls (',,' if your field separator is a comma, ';;' if your field separator is a semicolon) are not allowed in the row, so if you do not know the value for a particular field within the row, then type in a zero, -999, or 9999 (check the format in the middle column of [[#List_of_fields_in_the_file]] and think about the range of numbers allowed for particular fields as per examples in previous bullet). In other words put in an obviously strange number as Cumulus does not have a defined null! This strange number may distort graphs and any calculations, but it will remind you to make a more appropriate guess as soon as you can.
* Note that some fields (e.g. those related to evaporation, UV, solar data) will only contain valid data if your station has the appropriate sensor(s) (without the sensor they contain the default value of zero), but if they apply make sure you note which are stored as integers.
====Equivalent rules for MX ====
*All fields in all lines must contain the same character for separating one field from next and it must be consistent with whatever locale you use when you run MX (it might be set using a parameter to the command running MX, it might be set in Mono, or in Windows control panel).
* Each line must contain all the fields '''defined in the version of MX that you are using''' in correct sequence
* ''Feels like'' was added onto the end of this log file in version 3.5.4. Any line in any log file produced before you started using MX version 3.5.4 or later will end with ''Rain since midnight''. However, the way that MX was modified for version 3.5.4 means that those earlier lines will be modified by the application process interface used to transfer log lines between the MX engine and the admin interface to include the full number of fields per row and to contain a space character for that additional field. Consequently, any external edit also has to add a field separator and a space to every line where the original lacked feel like.
* The date format uses two digits for the year and should be treated as text. For software (e.g. Excel) with default of recognising formats, ensure that such recognition is turned off, as it is likely to change the dates to either a number representing days since e.g. 31 Dec 1899, or to have four figure years, and then Cumulus will no longer be able to use the log file. (Also the month must be the middle figure, USA convention cannot apply within ''Log_Files'').
* Times in these files are in the form ''hh:mm'' using a colon as separator, the 24 hour clock and local time (system time).
* If you are editing a log file that was produced by Cumulus 1 and it used a separator other than a colon (:) then the old separator must be replaced by colon.
* For MX the rules for fields containing values are different to those for Cumulus 1, which makes it difficult to successfully edit any pre MX log files. For MX if a field can take a decimal place, it must contain a decimal figure, and it must use the correct decimal separator as defined in locale. If the field only takes integers (see [[#List_of_fields_in_the_file]]) then you cannot edit in any decimal places.
===Importing pre-Cumulus data into Cumulus 1===
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