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Top Forums UNIX for Beginners Questions & Answers Format a date on additional column awk Post 303031762 by RudiC on Tuesday 5th of March 2019 12:07:04 PM
Old 03-05-2019
Welcome to the forum.


Please post your OS, shell, and preferred tools' versions in the future so people in here don't need to guess what system features you have available and which you don't.



Your RS character \r (<CR> = 0x0D = ^M) seems a bit strange a choice as \n (<LF> = 0x0A) is the *nix line terminator. How was that input file produced? And, no attempt was made to get to the desired day-of-week result.


GNU date around, and a shell with "process substitution"? Try
Code:
paste -d, file <(date -f<(awk -F"," '{print $1}' file) +%a)
05/20/1997,1130,5.93,5.96,5.93,5.96,49200,Di
05/20/1997,1131,5.96,5.96,5.9,5.93,252400,Di
05/14/1997,1132,5.93,5.99,5.93,5.99,89600,Mi
05/15/1997,1133,5.93,5.93,5.71,5.74,203200,Do

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DATETIME.SETISODATE(3)							 1						    DATETIME.SETISODATE(3)

DateTime::setISODate - Sets the ISO date

       Object oriented style

SYNOPSIS
public DateTime DateTime::setISODate (int $year, int $week, [int $day = 1]) DESCRIPTION
Procedural style DateTime date_isodate_set (DateTime $object, int $year, int $week, [int $day = 1]) Set a date according to the ISO 8601 standard - using weeks and day offsets rather than specific dates. PARAMETERS
o $object -Procedural style only: A DateTime object returned by date_create(3). The function modifies this object. o $year - Year of the date. o $week - Week of the date. o $day - Offset from the first day of the week. RETURN VALUES
Returns the DateTime object for method chaining or FALSE on failure. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.3.0 | | | | | | | Changed the return value on success from NULL to | | | DateTime. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 DateTime.setISODate(3) example Object oriented style <?php $date = new DateTime(); $date->setISODate(2008, 2); echo $date->format('Y-m-d') . " "; $date->setISODate(2008, 2, 7); echo $date->format('Y-m-d') . " "; ?> Procedural style <?php $date = date_create(); date_isodate_set($date, 2008, 2); echo date_format($date, 'Y-m-d') . " "; date_isodate_set($date, 2008, 2, 7); echo date_format($date, 'Y-m-d') . " "; ?> The above examples will output: 2008-01-07 2008-01-13 Example #2 Values exceeding ranges are added to their parent values <?php $date = new DateTime(); $date->setISODate(2008, 2, 7); echo $date->format('Y-m-d') . " "; $date->setISODate(2008, 2, 8); echo $date->format('Y-m-d') . " "; $date->setISODate(2008, 53, 7); echo $date->format('Y-m-d') . " "; ?> The above example will output: 2008-01-13 2008-01-14 2009-01-04 Example #3 Finding the month a week is in <?php $date = new DateTime(); $date->setISODate(2008, 14); echo $date->format('n'); ?> The above examples will output: 3 SEE ALSO
DateTime.setDate(3), DateTime.setTime(3). PHP Documentation Group DATETIME.SETISODATE(3)
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