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Calculate Missing Values: Difference between revisions
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The utility program,CreateMissing.exe, looks in the [[Data folder|data sub-folder]] to see if dayfile.txt exists (if it does, its file name has a '''.sav''' suffix added after the ''.txt''). If a file with .sav suffix already exists, the utility program will stop, as it cannot create a file if it already exists.
As the utility program, CreateMissing.exe, reads each line in any [[Standard log files|standard log file]] it is processing, it works out from the date and time in that line which meteorological date to assign that line to, using the rollover time and use 10am in summer settings. Any day with less than 5 standard log file lines is ignored for dayfile.txt, as is current day.
#At the start of each day, any maximum field in the output file (that is created as [[dayfile.txt]]) is set to an extreme negative, any minimum field in the same file is set to an extreme maximum, any daily total field is set to zero, and the cumulative chill hours field is set (either to the figure for the day before, or reset to zero for first day of new season).
# As each standard file line in that meteorological day is processed, any maximum field in the output file is updated if the read figure is higher than previous figure, any minimum field in the same file is updated if the read figure is lower than the previous figure, the total rainfall calculation changed between versions 1.0.0 and 1.0.1 (basically rain total is taken from the final line per day in the standard log file field 9)
# For fields like Heating Degree Days and Cooling Degree Days, CreateMissing.exe is tracking the temperature field 2 against the threshold it has read from Cumulus.ini, so if the degree day figure is missing, the utility is able to insert a figure based on the difference between temperature and threshold and the time since previous log (for heating degree days it is heating threshold minus temperature times minutes since last previous divided by 1440; for cooling it is temperature minus cooling threshold times minutes divided by 1440).
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