sed adding a new line not working Post: 302770906

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Top Forums Shell Programming and Scripting sed adding a new line not working Post 302770906 by alister on Tuesday 19th of February 2013 02:31:58 AM

Old

02-19-2013

Registered User

Quote:

Originally Posted by bhavanabahety

sed '/patternstring/ a\ new line string' file1

Try placing what follows the backslash on the next line.

Quote:

Originally Posted by bhavanabahety

it is still not working Smilie

Smilie

Smilie

Smilie

That is absolutely useless feedback. Tell us which sed implementation and operating system you're using. Show us the command you ran. Show us the data that's the input for the command. Show us the incorrect output that is being generated. And, finally, show us the correct output that you desire.

Quote:

Originally Posted by pamu

Code:

sed 's/patternstring/\n new line string/' file

A lot of sed implementations (and the POSIX standard) do not support the \n newline escape sequence in replacement text. The portable approach is to use a backslash followed by a literal newline.

Regards,
Alister

alister

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LEARN ABOUT MINIX

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)