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Top Forums Shell Programming and Scripting Grab text after pattern and replace Post 302959544 by RavinderSingh13 on Wednesday 4th of November 2015 09:25:36 AM
Old 11-04-2015
Hello gpk_newbie,

Following may help you to understand the command.
Code:
awk -F,                           ########### Making comma(,) as a field seprator.
'{gsub(/..../,"&-",$4);           ########### using global subtitutaion to change any 4 chars/digits etc to their value with - by using (&-) in $4 as per your request
sub(/\-$/,X,$4);}                 ########### When we use global subtitutaion then it will place - at last of the string then I am removing it by sub which means only single time subtitutaion, That's the difference between global subtitutaion and single substitutaion in awk.
1' OFS=,  Input_file              ########### awk works on condition and then action, if condition is TRUE following action mentioned in it will be performed. So here I am making comndition TRUE by mentioning 1 and no action mentoined so awk will take default action which is print so it will print the complete line then.

Thanks,
R. Singh
This User Gave Thanks to RavinderSingh13 For This Post:
 

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IMAGE_TO_J2K(1) 						  OPENJPEG TOOLS						   IMAGE_TO_J2K(1)

NAME
image_to_j2k - convert a PNM, PGM, PPM, PGX or BMP into a J2K or JP2 file SYNOPSIS
DESCRIPTION
image_to_j2k converts an image into a JPEG 2000-encoded image OPTIONS
-ImgDir sourcedir Directory of PGM, PPM, PNM, PGX or BMP files to convert -OutFor extension J2K or JP2 output file format -i source PNM, PGM or PPM file to convert -o destination J2K or JP2 file to output to -h Display help information -cinema2k fps Digital Cinema 2K profile compliant codestream for 2K resolution. 24 or 48 fps. -cinema4k [fps] Digital Cinema 4K profile compliant codestream for 4K resolution. fps default is 24 -r ratios compression factor for successive layers, comma seperated -q psnr psnr for successive layers, comma seperated -n rescount number of resolutions -b blocksize width and height of code block, comma-seperated -c precintsize width and height of precinct, comma-seperated -t tilesize width and height of tile, comma-seperated -p progression progression order, one of LRCP, RLCP, RPCL, PCRL, CPRL -s subsampling subsampling factor in X and Y, comma-seperated. Values larger than 2 can produce errors -POC orders progression order change -SOP write SOP marker before each packet -EPH write EPH marker after each header packet -M modeflags Sum of the values of the modes, as follows: 1. BYPASS (LAZY) 2. RESET 4. RESTART (TERMALL) 8. VSC 16. ERTERM (SEGTERM) 32. SEGMARK (SEGSYM) -x indexfile create an index file -ROI:quantize quantization indices upshifted for component c between 0 and 2 inclusive with an upshift of U between 0 and 37 inclusive -d imageoffset X and Y offset of the origin of the image, comma-seperated -T tileoffset X and Y offset of the origin of the tiles, comma-seperated -I use the irreversible DWT 9-7 EXAMPLE
ratios: 20,10,1 Quality 1: compress 20x; Quality 2: compress 10x; Quality 3: lossless compression psnr: 30,40,50 quantize: c=0,U=25 orders: T1=0,0,1,5,3,CPRL Title 1: Resolution 0 start, component 0 start, layer 1 end, resolution 5 end, component 3 end, CPRL progression AUTHOR
Written by Paul Hampson <Paul.Hampson@Pobox.com> based on the output of image_to_j2k -h as part of the Debian packaging of OpenJPEG COPYRIGHT
Copyright 2007 Paul Hampson SEE ALSO
j2k_to_image(1), <http://www.openjpeg.org/index.php?menu=doc#encoder> 1.3+dfsg 2014-04-22 IMAGE_TO_J2K(1)
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