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Full Discussion: take a section of a data with conditions
Top Forums Shell Programming and Scripting take a section of a data with conditions Post 302691773 by saeed.soltani on Saturday 25th of August 2012 05:20:52 PM
Old 08-25-2012
take a section of a data with conditions
I have a data file like below:
[input]
Code:
 
2011 0701 2015 21.2 L 37.692 46.202 18.0 Teh 4 0.3 2.1 LTeh 1
GAP=233 E
Iranian Seismological Center, Institute of Geophysics, University of Tehran 6
STAT SP IPHASW D HRMM SECON CODA AMPLIT PERI AZIMU VELO SNR AR TRES W DIS CAZ7
TBZ SN EPg 0 2015 31.19 -0.3 60.0 355
BST SZ EPg 0 2015 31.30 -0.3 61.0 89
　
2011 0702 0624 39.4 L 38.067 46.391 13.9 Teh 5 0.1 1.7 LTeh 1
GAP=157 E
Iranian Seismological Center, Institute of Geophysics, University of Tehran 6
STAT SP IPHASW D HRMM SECON CODA AMPLIT PERI AZIMU VELO SNR AR TRES W DIS CAZ7
SHB SZ EPg 0 0624 51.37 0.0 72.0 290
MRD SZ EPg 0 0624 54.83 0.1 94.0 320

i want to retain sections which have these constrains:
in the 1st field of each section (each section seprate with a blank line) which starts with "2011", if $12>3 then print the whole section. so i wrote this command with awk:
Code:
 
awk '/^201?/ {if ($12 > 3) {RS="";FS="\n"} print $0}' in > out

but the result doesn't have any changes with input!
 

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LEARN ABOUT DEBIAN

update-gap-workspace

UPDATE-GAP-WORKSPACE(1) 					   User Commands					   UPDATE-GAP-WORKSPACE(1)

NAME

       update-gap-workspace - manage a GAP workspace.

SYNOPSIS

       update-gap-workspace

       update-gap-workspace update

	      Create or update the GAP workspace.

       update-gap-workspace delete

	      Delete the GAP workspace.

DESCRIPTION

       At  start  up,  GAP  load  all  libraries and packages available on the system.	This take several seconds. To save time, GAP can store the
       result of this initialisation in a `workspace'.	update-gap-workspace help to manage such workspaces.  update-gap-workspace can be  run	as
       root  to  manage  the  system-wide  workspace.	update-gap-workspace  can be run as a normal user. In this case the workspace is stored in
       $HOME/gap/workspace.gz.

       Note that you need to rebuild the workspace each time GAP packages are added, removed or updated. To automate that task, if the system-wide
       workspace exists, it is automatically updated whenever a GAP-related Debian package is installed or upgraded.

       The gap script will automatically load such workspace at start up.

FILES

       /var/lib/gap/workspace.gz:
	      The system-wide GAP workspace.
       $HOME/gap/workspace.gz:
	      The user-specific GAP workspace.

SEE ALSO

       gap(1), The `SaveWorkspace' function in the GAP manual.

AUTHOR

       Bill Allombert <ballombe@debian.org>

NOTES

       We  are	considering  enabling the system-wide workspace per default, though this feature could be too confusing for old-time GAP users. If
       you have opinions about it, please mail <gap@packages.debian.org>.

Debian								     July 2003						   UPDATE-GAP-WORKSPACE(1)
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