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Full Discussion: Replace second match+awk/sed
Top Forums Shell Programming and Scripting Replace second match+awk/sed Post 302876289 by Corona688 on Friday 22nd of November 2013 04:14:14 PM
Old 11-22-2013
If I understand correctly... You want to move all dates 'up'? The dates for entry 3 go into entry 2, the dates for entry 2 go into entry 1, etc? I can certainly understand why you're finding it so difficult to go back in time and reprocess lines you've already processed. When you need to look backwards like that, I would scan the file twice:

Code:
awk 'NR==FNR { first pass code ; next } { second pass code ; print }' inputfile inputfile

Note how inputfile is given twice. The first time the file is read, it goes into the { first pass code } block, where you can save whatever information you need. The second time it reads the file, it goes into { second pass code } where you can do the substituting and printing.
 

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LEARN ABOUT DEBIAN

tca_correct

TCA_CORRECT(1)							       HUGIN							    TCA_CORRECT(1)

NAME

       tca_correct - Calculate transverse chromatic aberration

SYNOPSIS

       tca_correct [options] inputfile

       <inputfile> is the base name of 4 image files:

       <inputfile>
	   Colour file to compute TCA parameters

       red_<inputfile>
	   Red channel of <inputfile>

       green_<inputfile>
	   Green channel of <inputfile>

       blue_<inputfile>
	   Blue channel of <inputfile>

       The channel images must be colour images with 3 identical channels.  If any of -R, -G, or -B is given, this file name is used instead of
       the derived name.

       Output: commandline arguments for fulla

DESCRIPTION

       Generates fulla command-line parameters for correction of transverse chromatic aberration (TCA) from sample photos. Ideal sample photos
       would have a lot of contrast over the entire image area, little saturated colour and no blown highlights.

OPTIONS

       -h  Display help

       -l  input file is PTO file instead of image

       -m method
	   optimization method (0 normal, 1 newfit)

       -o optvars
	   string of variables to optimize ("abcvde")

       -r  Reset values (this will zero a,b,c,d,e params and set v to 10) makes sense only with -l option

       -s <scale>
	   Scale for corner detection

       -n <number>
	   number of points per grid cell (default: 10)

       -g <number>
	   divide image in <number>x<number> grid cells (default: 10)

       -t num
	   Remove all control points with an error higher than num pixels (default: 1.5)

       -v  Verbose

       -w filename
	   write PTO file

       -R <r>
	   Use this file as red channel

       -G <g>
	   Use this file as green channel

       -B <b>
	   Use this file as blue channel

AUTHORS

       Written by Pablo d'Angelo and others.

"Version: 2011.4.0"						    2011-12-02							    TCA_CORRECT(1)
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