5,838
edits
Dayfile.txt: Difference between revisions
From Cumulus Wiki
Jump to navigationJump to search
m
→Create Missing
mNo edit summary |
m (→Create Missing) |
||
|
The Cumulus 1 editor provides a "Create Missing" option where it will, for any dates for which a line does not exist, create a line if it can from reading the [[Monthly log files|detailed log file]] to extract all values relevant to that day and do the necessary minimum/maximum/total/average calculation for each dayfile.txt field, storing the time from the relevant other log file in any time-stamp field in dayfile.txt. If a particular day does not exist as a row on the daily summary log, then 'create missing' can search the observations in the relevant monthly log, and calculate approximate highs, lows and totals to insert as an extra row in the daily summary log. These are approximate because the actual highs and lows for that day are quite likely to have occurred at moments in-between those that were logged. For ''Create missing'' a list of inserted records is produced in [[dayfileeditlog.txt]]. If just some fields are wrong in a particular row (meteorological day) on day file, then there is a [[Standard_log_files#Using_Standard_logs_to_deal_with_shorter_.28or_incomplete.29_dayfile.txt_records_for_particular_dates | work around]] as at all current versions (up to 1.9.4) you can only use 'Create missing' to read from the [[Standard_log_files]] if the whole day (a line starting with that date) is missing in ''dayfile.txt''. Although Cumulus does not recognise the concept of a sensor not being available, it will write solar information even if you don't have a solar sensor; it does have to cope with reading a monthly log file that might have fewer derivatives than it wants (when using Create Missing) and therefore it may not know what to write into dayfile.txt as the calculated value. Cumulus 1 can't write a null value, so it writes zero for values, and "00:00" for time stamps. If you are using a 9am or 10am rollover time, be aware that create missing in Cumulus 1 always inserts 00:00 for null time-stamps, but in normal running Cumulus uses the rollover time for null time-stamps.
===Using Standard logs to deal with shorter (or incomplete) dayfile.txt records for particular dates===
'''WORKAROUND if required dates are present in both the standard log and dayfile.txt, but not all fields for that date exist in dayfile.txt'''
Example: '''add extra fields to records created by an earlier version of Cumulus''' [to help you, the versions (not builds) at which fields were added are indicated below].
Second example: records imported prior to Cumulus processing them, so some calculated parameters (apparent temperature, heat index, rain rate, wind run) may not have been available from your weather station to insert in the log files.
''One method '''for Cumulus 1 only''' is (not near rollover time) to (1) take a copy of dayfile.txt original as backup, (2) in original file delete any days with partial information (e.g. from Cumulus versions that created fewer fields), (3) use ''create missing'' in the [[dayfile.txt]] selection in the '''Edit''' menu option of Cumulus (note whilst datafile.txt normally calculates all parameters like minimums and maximums from very frequent samples of your weather station, the resolution of create missing is limited to the interval between logging records in the monthly log), (4) rename the amended dayfile.txt as dayfile(generated).txt, (5) create a new dayfile.txt and (6) use a text editor to merge the required fields from the new dayfile(generated).txt with all other fields from (with reading access only) the backup copy of the original file. (This method preserves the original as a backup so you can experiment with different merges and do some cross-checking).''
'''Cumulus MX'''
Although there is a tentative plan for an executable to be added to the MX package that can read the standard logs and calculate all the fields needed for a line in dayfile.txt, this is only a gleam in the developer's eye!
The only method available at the time of writing involves multiple steps:
#*Either use '''ExportMySQL.exe monthly''' to create a database table called "monthly", and read all the standard logs into that database table
#*Or if you already have the table and have MX updating the standard logs into that database table
#Then, you can fairly easily update to add any missing values into existing columns in this monthly table, and from it update columns in a daily summary table. See [https://cumulus.hosiene.co.uk/viewtopic.php?f=18&t=18096 this post in support forum] where I describe two PHP scripts designed for this type of task.
=== Importing data not recorded by Cumulus ===
| |||
