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Full Discussion: sed and cut behaving differently
Top Forums Shell Programming and Scripting sed and cut behaving differently Post 302417898 by amicon007 on Saturday 1st of May 2010 09:56:54 AM
Old 05-01-2010
sed and cut behaving differently
I have attached a file with few records. First 2 characters of each record are binary characters. I can remove it by

Quote:
cut -c3- sample
and it works fine. But

Quote:
sed 's/^..//' sample
is behaving differently and removing more than expected characters. Can someone help me in accomplishing it through sed? Thanks in advance.
sample.conf (1.1 KB) 
Last edited by amicon007; 05-01-2010 at 11:03 AM..
 

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LEARN ABOUT OSX

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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