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Full Discussion: sed to replace the matching pattern with equal number of spaces
Top Forums Shell Programming and Scripting sed to replace the matching pattern with equal number of spaces Post 302720493 by haris1 on Wednesday 24th of October 2012 09:56:36 AM
Old 10-24-2012
Hi ,
I have a doubt here
If my pattern is not fixed , like in below case then how can I do that using sed command .
I tried using awk command but it replaced N with Y in entire file.txt

Code:
 
awk -F '=' '{if ($1 == "test") {print $1"=Y"} else {print $1"=N"}}'  file.txt

input
Quote:
test_F1=N
test_F2=N
test1_F1=N
test2_F3=N
output
Quote:
test_F1=Y
test_F2=Y
test1_F1=N
test2_F3=N
Regards,
Haris
 

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LEARN ABOUT FREEBSD

ppmtopgm

ppmtopgm(1)                                                   General Commands Manual                                                  ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and  pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

                                                                   10 April 2000                                                       ppmtopgm(1)
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