Bash script max value per hour


 
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# 8  
Old 10-17-2017
If the file is sorted, and the data exceeds 24 hours, then the results will show only the maximum value for an hour on any day rather than the maximum for each hour on every day.

Code:
MAX=0
PREV_HR=25
while read time count
do
hour=${time:0:2}
if ( $PREV_HR -eq 25 )
then
      PREV_HR=$hour
fi
if ( $hour -ne $PREV_HR )
then
    echo $PREV_HR $MAX
    PREV_HR=$hour
    MAX=0
fi
if ( $count -gt $MAX )
then
    MAX=$count
fi
done
echo $PREV_HR $MAX

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PX_TIMESTAMP2STRING(3)					     Library Functions Manual					    PX_TIMESTAMP2STRING(3)

NAME
PX_timestamp2string -- Convert paradox timestamp into formated string SYNOPSIS
#include <paradox.h> char * PX_timestamp2string(pxdoc_t *pxdoc, double timestamp, const char *format) DESCRIPTION
Creates a string representation of a paradox timestamp as specified in the parameter format. The timestamp must be either retrieved with PX_get_data_double(3) after calling PX_get_record(3) or by simply using the double value in the pxval_t struct as returned by PX_retrieve_record(3). A timestamp contains both time and date information. The format string contains chars which stand for certain values of the date/time. The following table lists all available characters with a meaning. All other characters are being copied unmodified to the output string. If a special character shall not be interpreted it must be preceded with a backslash. Characters and their meaning in date/time format string Character Meaning Y year, numeric, 4 digits y year, numeric, 2 digits m month, numeric n month, numeric, no leading zeroes d day of the month, numeric j T{ day of the month, numeric, no leading zeros T} H hour, numeric, 24 hour format h hour, numeric, 12 hour format G T{ hour, numeric, 24 hour format, no leading zeroes T} g T{ hour, numeric, 12 hour format, no leading zeroes T} i minutes, numeric s seconds, numeric A AM/PM a am/pm L boolean for leap year RETURN VALUE
Returns pointer to string on success and NULL on failure. SEE ALSO
PX_time2string(3), PX_date2string(3) AUTHOR
This manual page was written by Uwe Steinmann uwe@steinmann.cx. PX_TIMESTAMP2STRING(3)