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Top Forums Shell Programming and Scripting Sed or awk script to remove text / or perform calculations from large CSV files Post 302326271 by metronomadic on Wednesday 17th of June 2009 01:08:32 PM
Old 06-17-2009
Question Sed or awk script to remove text / or perform calculations from large CSV files

I have a large CSV files (e.g. 2 million records) and am hoping to do one of two things. I have been trying to use awk and sed but am a newbie and can't figure out how to get it to work. Any help you could offer would be greatly appreciated - I'm stuck trying to remove the colon and wildcards in sed, and the average sample I've found using awk is giving me values of around 4e08.

The CSV file looks like this:

Code:
Date,AIRCOMPRESSOR\FLARE_FLOW,AIRCOMPRESSOR\FLARE_TEMP
3/1/2008,1044.83215332,1090.88208008
3/1/2008 12:00:10 AM,1044.83215332,1090.88208008
3/1/2008 12:00:21 AM,1046.71142578,1090.88208008
3/1/2008 12:00:31 AM,1044.83215332,1090.88208008
3/1/2008 12:00:41 AM,1048.59057617,1083.96069336
3/1/2008 12:00:51 AM,1044.83215332,1083.96069336

I am hoping to either use sed or another script to remove the seconds portion of the data lines (i.e. remove ":10 AM" and all similar occurrences, or preferably to use awk to average the flow rates for each minute or each 15 minutes (i.e. the column right after the time).

Thanks in advance for any help you can offer.
 

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DateTime::Locale::ky(3) 				User Contributed Perl Documentation				   DateTime::Locale::ky(3)

NAME
DateTime::Locale::ky SYNOPSIS
use DateTime; my $dt = DateTime->now( locale => 'ky' ); print $dt->month_name(); DESCRIPTION
This is the DateTime locale package for Kirghiz. DATA
This locale inherits from the DateTime::Locale::root locale. It contains the following data. Days Wide (format) 2 3 4 5 6 7 1 Abbreviated (format) 2 3 4 5 6 7 1 Narrow (format) 2 3 4 5 6 7 1 Wide (stand-alone) 2 3 4 5 6 7 1 Abbreviated (stand-alone) 2 3 4 5 6 7 1 Narrow (stand-alone) 2 3 4 5 6 7 1 Months Wide (format) 1 2 3 4 5 6 7 8 9 10 11 12 Abbreviated (format) 1 2 3 4 5 6 7 8 9 10 11 12 Narrow (format) 1 2 3 4 5 6 7 8 9 10 11 12 Wide (stand-alone) 1 2 3 4 5 6 7 8 9 10 11 12 Abbreviated (stand-alone) 1 2 3 4 5 6 7 8 9 10 11 12 Narrow (stand-alone) 1 2 3 4 5 6 7 8 9 10 11 12 Quarters Wide (format) Q1 Q2 Q3 Q4 Abbreviated (format) Q1 Q2 Q3 Q4 Narrow (format) 1 2 3 4 Wide (stand-alone) Q1 Q2 Q3 Q4 Abbreviated (stand-alone) Q1 Q2 Q3 Q4 Narrow (stand-alone) 1 2 3 4 Eras Wide BCE CE Abbreviated BCE CE Narrow BCE CE Date Formats Full 2008-02-05T18:30:30 = 3, 2008 2 05 1995-12-22T09:05:02 = 6, 1995 12 22 -0010-09-15T04:44:23 = 7, -10 9 15 Long 2008-02-05T18:30:30 = 2008 2 5 1995-12-22T09:05:02 = 1995 12 22 -0010-09-15T04:44:23 = -10 9 15 Medium 2008-02-05T18:30:30 = 2008 2 5 1995-12-22T09:05:02 = 1995 12 22 -0010-09-15T04:44:23 = -10 9 15 Short 2008-02-05T18:30:30 = 08/02/05 1995-12-22T09:05:02 = 95/12/22 -0010-09-15T04:44:23 = -10/09/15 Default 2008-02-05T18:30:30 = 2008 2 5 1995-12-22T09:05:02 = 1995 12 22 -0010-09-15T04:44:23 = -10 9 15 Time Formats Full 2008-02-05T18:30:30 = 18:30:30 UTC 1995-12-22T09:05:02 = 09:05:02 UTC -0010-09-15T04:44:23 = 04:44:23 UTC Long 2008-02-05T18:30:30 = 18:30:30 UTC 1995-12-22T09:05:02 = 09:05:02 UTC -0010-09-15T04:44:23 = 04:44:23 UTC Medium 2008-02-05T18:30:30 = 18:30:30 1995-12-22T09:05:02 = 09:05:02 -0010-09-15T04:44:23 = 04:44:23 Short 2008-02-05T18:30:30 = 18:30 1995-12-22T09:05:02 = 09:05 -0010-09-15T04:44:23 = 04:44 Default 2008-02-05T18:30:30 = 18:30:30 1995-12-22T09:05:02 = 09:05:02 -0010-09-15T04:44:23 = 04:44:23 Datetime Formats Full 2008-02-05T18:30:30 = 3, 2008 2 05 18:30:30 UTC 1995-12-22T09:05:02 = 6, 1995 12 22 09:05:02 UTC -0010-09-15T04:44:23 = 7, -10 9 15 04:44:23 UTC Long 2008-02-05T18:30:30 = 2008 2 5 18:30:30 UTC 1995-12-22T09:05:02 = 1995 12 22 09:05:02 UTC -0010-09-15T04:44:23 = -10 9 15 04:44:23 UTC Medium 2008-02-05T18:30:30 = 2008 2 5 18:30:30 1995-12-22T09:05:02 = 1995 12 22 09:05:02 -0010-09-15T04:44:23 = -10 9 15 04:44:23 Short 2008-02-05T18:30:30 = 08/02/05 18:30 1995-12-22T09:05:02 = 95/12/22 09:05 -0010-09-15T04:44:23 = -10/09/15 04:44 Default 2008-02-05T18:30:30 = 2008 2 5 18:30:30 1995-12-22T09:05:02 = 1995 12 22 09:05:02 -0010-09-15T04:44:23 = -10 9 15 04:44:23 Available Formats d (d) 2008-02-05T18:30:30 = 5 1995-12-22T09:05:02 = 22 -0010-09-15T04:44:23 = 15 EEEd (d EEE) 2008-02-05T18:30:30 = 5 3 1995-12-22T09:05:02 = 22 6 -0010-09-15T04:44:23 = 15 7 Hm (H:mm) 2008-02-05T18:30:30 = 18:30 1995-12-22T09:05:02 = 9:05 -0010-09-15T04:44:23 = 4:44 hm (h:mm a) 2008-02-05T18:30:30 = 6:30 PM 1995-12-22T09:05:02 = 9:05 AM -0010-09-15T04:44:23 = 4:44 AM Hms (H:mm:ss) 2008-02-05T18:30:30 = 18:30:30 1995-12-22T09:05:02 = 9:05:02 -0010-09-15T04:44:23 = 4:44:23 hms (h:mm:ss a) 2008-02-05T18:30:30 = 6:30:30 PM 1995-12-22T09:05:02 = 9:05:02 AM -0010-09-15T04:44:23 = 4:44:23 AM M (L) 2008-02-05T18:30:30 = 2 1995-12-22T09:05:02 = 12 -0010-09-15T04:44:23 = 9 Md (M-d) 2008-02-05T18:30:30 = 2-5 1995-12-22T09:05:02 = 12-22 -0010-09-15T04:44:23 = 9-15 MEd (E, M-d) 2008-02-05T18:30:30 = 3, 2-5 1995-12-22T09:05:02 = 6, 12-22 -0010-09-15T04:44:23 = 7, 9-15 MMM (LLL) 2008-02-05T18:30:30 = 2 1995-12-22T09:05:02 = 12 -0010-09-15T04:44:23 = 9 MMMd (MMM d) 2008-02-05T18:30:30 = 2 5 1995-12-22T09:05:02 = 12 22 -0010-09-15T04:44:23 = 9 15 MMMEd (E MMM d) 2008-02-05T18:30:30 = 3 2 5 1995-12-22T09:05:02 = 6 12 22 -0010-09-15T04:44:23 = 7 9 15 MMMMd (MMMM d) 2008-02-05T18:30:30 = 2 5 1995-12-22T09:05:02 = 12 22 -0010-09-15T04:44:23 = 9 15 MMMMEd (E MMMM d) 2008-02-05T18:30:30 = 3 2 5 1995-12-22T09:05:02 = 6 12 22 -0010-09-15T04:44:23 = 7 9 15 ms (mm:ss) 2008-02-05T18:30:30 = 30:30 1995-12-22T09:05:02 = 05:02 -0010-09-15T04:44:23 = 44:23 y (y) 2008-02-05T18:30:30 = 2008 1995-12-22T09:05:02 = 1995 -0010-09-15T04:44:23 = -10 yM (y-M) 2008-02-05T18:30:30 = 2008-2 1995-12-22T09:05:02 = 1995-12 -0010-09-15T04:44:23 = -10-9 yMEd (EEE, y-M-d) 2008-02-05T18:30:30 = 3, 2008-2-5 1995-12-22T09:05:02 = 6, 1995-12-22 -0010-09-15T04:44:23 = 7, -10-9-15 yMMM (y MMM) 2008-02-05T18:30:30 = 2008 2 1995-12-22T09:05:02 = 1995 12 -0010-09-15T04:44:23 = -10 9 yMMMEd (EEE, y MMM d) 2008-02-05T18:30:30 = 3, 2008 2 5 1995-12-22T09:05:02 = 6, 1995 12 22 -0010-09-15T04:44:23 = 7, -10 9 15 yMMMM (y MMMM) 2008-02-05T18:30:30 = 2008 2 1995-12-22T09:05:02 = 1995 12 -0010-09-15T04:44:23 = -10 9 yQ (y Q) 2008-02-05T18:30:30 = 2008 1 1995-12-22T09:05:02 = 1995 4 -0010-09-15T04:44:23 = -10 3 yQQQ (y QQQ) 2008-02-05T18:30:30 = 2008 Q1 1995-12-22T09:05:02 = 1995 Q4 -0010-09-15T04:44:23 = -10 Q3 yyQ (Q yy) 2008-02-05T18:30:30 = 1 08 1995-12-22T09:05:02 = 4 95 -0010-09-15T04:44:23 = 3 -10 Miscellaneous Prefers 24 hour time? Yes Local first day of the week 2 SUPPORT
See DateTime::Locale. AUTHOR
Dave Rolsky <autarch@urth.org> COPYRIGHT
Copyright (c) 2008 David Rolsky. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. This module was generated from data provided by the CLDR project, see the LICENSE.cldr in this distribution for details on the CLDR data's license. perl v5.18.2 2017-10-06 DateTime::Locale::ky(3)
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