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Top Forums UNIX for Beginners Questions & Answers Changing CSV files with date . Subtracting date by values Post 303025402 by arunkumar_mca on Thursday 1st of November 2018 02:28:43 PM
Old 11-01-2018
Changing CSV files with date . Subtracting date by values

Hi All,

I have a CSV file which is as below. Basically I need to take the year column in it and find if the year is >= 20152 . If that is then I should subtract all values by 6. In the below example in description I am having number mentioned as YYWW so I need to subtract those by -5. Whereever I find the year I have ti subtract by -5. If the year is >201601 then I have to subtrct by -6. The year representation is 52 week. so if the week falls on 03 for example 201403 then the subtraction of -6 will yield 201347. I am planning to do in C++ ,not sure if this possible with awk or sed.

Code:
Year representation goes like 
201101
201103
..
..
..
201151
201152
201201
201202

Original
Code:
id,description,type,year,obj
994475,1832 +TRANS     1835 10/17/18,S,201835,P
994477,1836 + NOTAPP 1839 10/17/18,S,201839,1
828058,CONTROL 1452-1527,1552-1627,S,201627,OP
828059,1452-1527,1552-1627,S,201627,UU

Modified
Code:
id,description,type,year
994475,1820 +TRANS     1829 10/17/18,S,201829,P         ---------------------  Year is 2018  should be subtracted by 6
994477,1830 + NOTAPP 1833 10/17/18,S,201833 ,1         ---------------------  Year is 2018  should be subtracted by 6
828058,CONTROL 1436-1521,1546-1621,S,201621,OP  ---------------------  Year is 2016  should be subtracted by 6
828059,1447-1522,1547-1602 ,S,201622,UU ---------------------                Year is 2015  should be subtracted by 5


Last edited by RudiC; 11-01-2018 at 04:24 PM..
 

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XCALEV(1)						      General Commands Manual							 XCALEV(1)

NAME
xcalev - load xcal calendar files with regular dates SYNTAX
xcalev [ -r ][ -x ][ -f file ][ -d dir ][ year ] DESCRIPTION
Xcalev is used to preload the calendar files for the xcal program with regular events in your life. It reads lines from a file (usually called regular stored in your Calendar directory. Each line in the file contains three fields separated by spaces or tabs, these are: a month name, a day in the month and some text. For example: December 25 Christmas Dec 31 New Year's Eve The order of the month and the day are optional, the program deduces the day by looking whether the string contains an initial numeric character or not. The year defaults to the current year unless the program is given a year number as an argument. This year cannot be abbreviated to two digits because xcal deals with years from year zero. There's a rough validity check on this. The string from the data line is inserted in the appropriate file and will appear in your xcal date strip. Nothing will happen if the string already exists in the file for that day. This means that it's safe to run xcalev at any time, only the strings that have altered in the regular file will be updated. To help with entering the same event for a number of days in one month, you can give a day range with a hyphen Jan 16-21 Usenix SF If you supply the -r option, xcalev will delete all the matching strings that it finds in the appropriate daily file. So, if you want to make radical changes to the regular file, you should run xcalev with the -r option to remove all the current entries from one year, edit the regular file and run xcalev to reload things. OPTIONS
The -r option makes xcalev delete rather than append entries. The -x option makes xcalev operate with Calendar files that are compatible with the xcalendar program. The -f switch is followed by a filename gives an alternative name for the regular file. If the filename does not start with a slash or a dot, then the name of your Calendar directory will be prepended to it. The -d switch is followed by a directory name and specifies an alterative location for your Calendar directory. Your home directory is prepended if the name doesn't start with a slash or a dot. FILES
$HOME/Calendar/* xc<dd><Mon><Year> A data file is day, Month in three letter format and the year. xy<Year> A year directory. xw<Day> A data file for the weekly code, one per day. SEE ALSO
xcal(1), xcalpr(1), xcal_cal(1) AUTHOR
Copyright 1993 by Peter Collinson, Hillside Systems All rights reserved. X Version 11 R5 October 1993 XCALEV(1)
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